Local Hazard Mitigation Plan Update
1 City of Cathedral City 2025 Local Hazard
Mitigation Plan Update
Prepared by
Jacob Green and Associates
13217 Jamboree Rd
Tustin, CA 92782
Local Hazard Mitigation Plan Update
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Local Hazard Mitigation Plan Update
3 INTRODUCTION ....................................................................................................... 5 Structure of the 2025 LHMP Update ................................ ................................ ................. 5 Plan Submission and Approval ................................ ................................ ....................... 6 Planning Team ................................ ................................ ................................ ............... 6 SECTION 1 – HAZARD MITIGATION ............................................................................. 8 Hazard Mitigation Planning ................................ ................................ ............................. 8 SECTION 2 – COMMUNITY PROFILE ......................................................................... 12
2.1 Setting and Location ................................ ................................ ................................ 12
2.2 History ................................ ................................ ................................ .................... 13
2.3 Climate ................................ ................................ ................................ ................... 15
2.4 Climate Change................................ ................................ ................................ ....... 18
2.5 Demographics ................................ ................................ ................................ ......... 19
2.6 Housing and Development ................................ ................................ ....................... 21
2.7 Economy ................................ ................................ ................................ ................. 25
2.8 Infrastructure ................................ ................................ ................................ .......... 27
2.9 Historically Vulnerable Populations ................................ ................................ .......... 30 SECTION 3 – HAZARD IDENTIFICATION AND RISK ASSESSMENT ............................... 32
3.1 Introduction ................................ ................................ ................................ ............ 32
3.2 Identifying Hazards ................................ ................................ ................................ .. 38
3.3 Hazard Profiles ................................ ................................ ................................ ........ 42 SECTION 4 – VULNERABILITY ASSESSMENT ........................................................... 152
4.1 Introduction ................................ ................................ ................................ .......... 154
4.2 Hazard-Specific Vulnerability Analysis ................................ ................................ .... 156
4.3 Critical Infrastructure & Key Resources ................................ ................................ ... 204 SECTION 5 – CAPABILITY ASSESSMENT ................................................................. 209
5.1 Planning & Regulatory Capabilities ................................ ................................ ......... 210
5.2 Floodplain Management & Compliance ................................ ................................ ... 216
5.3 Administrative & Technical Capabilities ................................ ................................ .. 230
5.4 Financial Capabilities ................................ ................................ ............................ 234 Local Hazard Mitigation Plan Update
4 5.5 Community Partnerships & Collaboration ................................ ............................... 235
5.6 Strengths, Weaknesses, Opportunities, and Threats (SWOT) Analysis ....................... 238
5.7 Opportunities for Improvement ................................ ................................ .............. 242 SECTION 6 – MITIGATION STRATEGY ...................................................................... 246
6.1 Introduction ................................ ................................ ................................ .......... 246
6.2 Vision, Goals, & Objectives ................................ ................................ .................... 248
6.3 Mitigation Actions................................ ................................ ................................ .. 251
6.4 Status of Prior Mitigation Actions ................................ ................................ ............ 264
6.5 Actions Considered but Not Included ................................ ................................ ...... 266
6.6 Implementation & Monitoring ................................ ................................ ................. 268 SECTION 7 – PLANNING, MAINTENANCE AND ADOPTION ....................................... 271
7.1 Planning Process ................................ ................................ ................................ ... 271
7.2 Plan Update ................................ ................................ ................................ .......... 275
7.3 Stakeholder Involvement ................................ ................................ ....................... 277
7.4 Public Involvement ................................ ................................ ................................ 279
7.5 Plan Incorporation ................................ ................................ ................................ . 280
7.6 Monitoring, Evaluating and Updating the Plan ................................ .......................... 282
7.7 Plan Adoption ................................ ................................ ................................ ........ 287 APPENDICES ....................................................................................................... 289 Appendix A: Sample Adoption Resolution ................................ ................................ ..... 289 Appendix B: LHMP Approval Process ................................ ................................ ............ 291 Appendix C. Public Outreach Documentation ................................ ............................... 293 Appendix D: Survey Results (English) ................................ ................................ ........... 299
Local Hazard Mitigation Plan Update
5 INTRODUCTION
This document serves as the City of Cathedral City’s Local Hazard Mitigation Plan (LHMP) update for 2025. Hazard mitigation plans are designed to guide communities in reducing the adverse impacts of natural and human -caused hazards by identifying vulnerabi lities and implementing strategies to enhance resilience. The preparation and adoption of an LHMP also provides eligibility for Federal Emergency Management Agency (FEMA) grant programs, allowing the City to secure funding for mitigation projects outlined in the plan.
FEMA requires that LHMPs be updated every five (5) years to maintain eligibility for hazard mitigation funding and ensure that the plan reflects current risks, vulnerabilities, and best practices. Cathedral City’s previous LHMP update was completed in 2018. This 2025 update includes significant revisions, aligning with FEMA’s latest guidance.
Structure of the 2025 LHMP Update
The 2025 Cathedral City LHMP Update consists of the following sections:
• An overview of hazard mitigation planning, its purpose, and benefits to the community. • A profile of Cathedral City, detailing its history, climate, demographics, infrastructure, and vulnerable communities.
• An in-depth examination of identified hazards, which were selected in collaboration with City officials and stakeholders. These include:
• Extreme heat
• Drought
• Fire
• Power outage
• Earthquake
• Flooding
• High wind/storms
• Cyberattack/IT disruption
• Infectious disease/pandemic
• Landslide
• Sandstorms
• Transportation-related disruptions
Local Hazard Mitigation Plan Update
6 • An assessment of Cathedral City’s capabilities to mitigate these hazards, including an evaluation of local policies, emergency response resources, land use regulations, and interagency coordination efforts.
• A prioritized list of potential mitigation actions, along with strategies to enhance implementation, funding opportunities, and community engagement. • A description of the LHMP planning process, including stakeholder involvement, public outreach efforts, and integration with existing city and regional plans. • A plan for maintaining and updating the LHMP, ensuring that it remains a living document that continues to support Cathedral City’s resilience goals.
Plan Submission and Approval
The 2025 Cathedral City LHMP Update was submitted to the California Governor’s Office of Emergency Services (Cal OES) and the Federal Emergency Management Agency (FEMA) for approval on [INSERT DATE]. The Cathedral City City Council reviewed and adopted the LHMP on [INSERT DATE], ensuring that the plan remains in effect and that the City retains eligibility for federal hazard mitigation funding programs.
This update represents Cathedral City’s commitment to proactive hazard mitigation planning, ensuring the safety, sustainability, and long-term resilience of the community.
Planning Team
Fire Department
Michael Contreras – Fire Chief
Stakeholder Group
Robert Bradbury -Director of Emergency Services, Agua Caliente Band of Cahuilla Indians Laura James – Chief Executive Officer, Coachella Valley Economic Partnership Angelique Ontiveros – Vice President, Business Development, Desert Arc Gregory Papazian – Emergency Management & Safety Administrator, Coachella Valley Water District
Jacob Green and Associates
Local Hazard Mitigation Plan Update
7 Patrick Marchman, AICP, SCR, Project Manager
Local Hazard Mitigation Plan Update
8 SECTION 1 – HAZARD MITIGATION
Hazard Mitigation Planning
The goal of hazard mitigation is to reduce the frequency and severity of disasters, minimize their impact on communities, and promote resilience and sustainability in the face of future emergencies. This can include measures such as building codes and stan dards, zoning regulations, evacuation plans, early warning systems, and disaster-resistant infrastructure. By taking a proactive approach to disaster risk reduction, we can help to save lives, reduce the economic impact of disasters, and ensure that communities are better prepared to respond to and recover from emergencies.
Hazard mitigation planning improves a community's ability to effectively respond to natural disasters by establishing plans for maintaining continuity of operations for both government and community entities. The process involves identifying attainable goa ls to reduce the risk of injury, loss of life, and property damage from hazardous events, and developing strategies and activities to mitigate their effects.
Hazard mitigation planning is intended to be a participatory process that involves government agencies, stakeholders, and the public. The planning process includes scheduled events that encourage participation and ensure that a comprehensive approach is taken to address current and future hazards.
By incorporating a systematic and inclusive approach, the local hazard mitigation plan (LHMP) helps to reduce the community's vulnerability to disasters and promote resilience.
Purpose and Authority
The City of Cathedral City’s 2025 Local Hazard Mitigation Plan (LHMP) outlines the potential natural and human-caused hazards that pose a threat to the citizens, resources, and property in the City. The plan also outlines the city’s objectives and commitme nt to reducing the risks associated with these hazards.
The focus of this LHMP is on the hazards that pose the greatest risk to the city, as determined through a comprehensive hazard risk assessment and input from local officials. The updated risk assessment will help the city prioritize and update mitigation a ctions based on the hazards that pose the greatest risk to lives and property.
Local Hazard Mitigation Plan Update
9 FEMA and California Requirements and Compliance
The City of Cathedral City’s risk assessment and hazard mitigation planning efforts adhere to both federal and state regulatory requirements, ensuring compliance with the Disaster Mitigation Act of 2000 (DMA 2000) (Public Law 106-390) and California Government Code §65302(g), which mandates the integration of climate adaptation and hazard mitigation into local planning efforts.
Federal Compliance: FEMA Requirements
The City of Cathedral City’ risk assessment and hazard mitigation planning efforts are guided by federal regulations established under the Disaster Mitigation Act of 2000 (DMA 2000) (Public Law 106 -390), which amended the Robert T. Stafford Disaster Relief and Emergency Assistance Act (42 U.S.C. 5121 et seq.). These regulations, codified in Title 44 of the Code of Federal Regulations (CFR) Part 201, require local jurisdictions to develop and maintain a FEMA -approved Local Hazard Mitigation Plan (LHMP) to remain eligible for federal hazard mitigation funding, including grants under the Hazard Mitigation Grant Program (HMGP) and Flood Mitigation Assistance (FMA) Program, among others.
To achieve compliance with 44 CFR §201.6, this plan includes:
• Risk Assessment (§201.6(c)(2)) – A comprehensive analysis of hazard exposure, vulnerability, and potential impacts on people, property, and critical infrastructure. • Mitigation Strategy (§201.6(c)(3)) – A framework of goals, objectives, and prioritized actions designed to reduce long-term risks from identified hazards. • Plan Maintenance Process (§201.6(c)(4)) – A strategy for periodic review, evaluation, and updates to ensure the plan remains current and effective. • Public Involvement (§201.6(b)(1)) – Documentation of community engagement efforts, including outreach to stakeholders, residents, and neighboring jurisdictions. • Integration with Other Plans (§201.6(c)(4)(ii)) – A demonstration of how hazard mitigation efforts align with the General Plan Safety Element, Emergency Operations Plan (EOP), Capital Improvement Plan (CIP), and other local and regional planning mechanisms.
FEMA requires that LHMPs be updated and resubmitted every five years to reflect changes in development patterns, emerging hazard risks, and progress on mitigation actions. This ensures that the City remains eligible for FEMA disaster funding and continues to align with national hazard mitigation priorities, including those outlined in FEMA’s National Mitigation Investment Strategy (NMIS) and the National Risk Index (NRI).
Local Hazard Mitigation Plan Update
10 State of California Compliance: SB 379, SB 1035, and General Plan Integration
In addition to federal requirements, California has established additional hazard mitigation and resilience mandates through legislation that integrates climate adaptation into local planning:
• Senate Bill 379 (SB 379) – Climate Adaptation and Resilience (2015): Requires local jurisdictions to include climate adaptation and vulnerability assessments in the Safety Element of their General Plan, ensuring alignment with the Local Hazard Mitigation Plan (LHMP). • Senate Bill 1035 (SB 1035) – Safety Element Updates (2018): Mandates that the Safety Element be reviewed and updated alongside the LHMP every eight years to account for flooding, wildfires, sea-level rise, and other climate change-related hazards. • California Government Code §65302(g): Requires that cities and counties integrate climate resilience and hazard mitigation into their General Plans, ensuring that disaster risk reduction strategies align with broader land use, housing, infrastructure, and sustainability goals.
Hazard Mitigation Grant Funding
The U.S. Congress passed the Disaster Mitigation Act of 2000 (DMA 2000), which amended the Robert T. Stafford Disaster Relief and Emergency Assistance Act and emphasized the need for state and local governments to closely coordinate their mitigation planni ng activities. The development of a hazard mitigation plan is a specific eligibility requirement for any local government applying for federal mitigation grant funds. These funds include the Hazard Mitigation Grant Program (HMGP) and Flood Mitigation Assistance (FMA), administered by FEMA.
• Hazard Mitigation Grant Program (HMGP): To qualify for post-disaster mitigation funds, local jurisdictions must have an approved mitigation plan from FEMA. HMGP provides funds to states, territories, Indian tribal governments, local governments, and eligible private non-profit organizations (such as hospitals and special needs populations) following a presidential disaster declaration.
• Flood Mitigation Assistance (FMA): A community must have an approved mitigation plan from FEMA to be eligible for FMA grants to implement flood mitigation, acquisition, or elevation of flood-prone homes. The community must also participate in the National Flood Insurance Program (NFIP) since one of the goals of FMA is to reduce or eliminate NFIP claims.
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12 SECTION 2 – COMMUNITY PROFILE
This is an overview of the City of Cathedral City with information about the community’s physical setting, history, economy and demographics, current and future land uses, and key infrastructure. The Community Profile establishes the baseline conditions th at informs the development of hazard mitigation actions.
2.1 Setting and Location
Cathedral City encompasses a total land area of approximately 21.5 square miles. Situated in the Coachella Valley region of Southern California, it lies roughly 115 miles east of downtown Los Angeles.
The city is bordered by Palm Springs to the west and Ra ncho Mirage to the east, with the San Jacinto Mountains to the southwest and the Little San Bernardino Mountains to the northeast. Interstate 10
Local Hazard Mitigation Plan Update
13 traverses the northern part of Cathedral City, serving as a vital transportation corridor that enhances regional connectivity. Additionally, major highways such
as U.S. Route 111 run through the city, further facilitating access to neighboring communities and the broader metropolitan area.
Cathedral City has a varied topography, with elevations ranging from approximately 165 feet to 1,040 feet above sea level, and an average elevation of about 322 feet (98 meters). The terrain includes both flat areas and gentle slopes, making it suitable fo r a mix of residential, commercial, and recreational developments. The city’s landscape is characterized by its desert environment, with natural features such as the nearby San Jacinto and Santa Rosa Mountains contributing to its unique geographical setting.
Cathedral City’s transportation infrastructure is well -developed, with Interstate 10 running through the northern part of the city, providing a critical link to other regions. East Palm Canyon Drive (formerly known as State Route 111) also passes through t he southern portion of the city, enhancing accessibility to neighboring areas.
2.2 History
The region now known as Cathedral City has been inhabited for at least 2,000 to 3,000 years by the Cahuilla people, whose language belongs to the Uto -Aztecan family. The Cahuilla are traditionally organized into three primary groups: the Mountain Cahuilla, Pass Cahuilla, and Desert Cahuilla. The Coachella Valley area-including present-day Cathedral City-was historically the territory of the Desert Cahuilla, who developed a deep ecological understanding and adaptive strategies suited to the arid desert environment.
Cahuilla villages were established near critical water sources, including Lake Cahuilla, a prehistoric freshwater lake that once filled much of the Coachella Valley. Geological and archaeological evidence suggests the lake’s last major desiccation occurred around 1580 CE. In response, the Cahuilla utilized underground springs and cultivated native desert plants such as mesquite, agave, and the California fan palm (Washingtonia filifera), which served vital roles in diet, construction, and cultural practices.
The Agua Caliente Hot Springs, located within the ancestral territory of the Agua Caliente Band of Cahuilla Indians, held significant cultural and spiritual importance as a site for healing and ceremonial use. The Cahuilla also developed advanced irrigatio n and resource management systems that enabled Local Hazard Mitigation Plan Update
14 sustainable agriculture in desert conditions, supplemented by hunting and foraging of local fauna and flora.
The first documented European contact in the greater region occurred in 1774, when the Juan Bautista de Anza Expedition passed through parts of Southern California’s inland desert. Although Mission San Gabriel Arcángel was established earlier, in 1771, Spanish influence
spread eastward over time. Unlike coastal tribes, the Cahuilla’s geographic remoteness enabled relative autonomy during the mission period, though new trade networks and European diseases nevertheless impacted their population.
Following Mexican independence from Spain in 1821, California became part of Mexico, and much of the Coachella Valley was distributed through land grants or ranchos. Some Cahuilla people were incorporated into ranching systems as laborers, though many continued traditional practices in remote settlements. After the Mexican -American War, California became a U.S. territory in 1848 under the Treaty of Guadalupe Hidalgo.
Increased American settlement in the late 19th century brought pressure on indigenous lands. In 1876, President Ulysses S. Grant established the Agua Caliente Indian Reservation by executive order. The reservation was expanded in 1877, resulting in the “checkerboard” land ownership pattern that remains a defining feature of regional land management today.
In 1855, Colonel Henry Washington of the U.S. Army Corps of Engineers surveyed a canyon in the area and named it Cathedral Canyon due to rock formations that resembled the interior of a cathedral.
The name would later inspire the identity of the developing community.
Formal development of Cathedral City began in 1925 with the establishment of its first subdivision.
The city was officially incorporated on November 16, 1981, and has since grown into a residential, commercial, and cultural center within the Coachella Valley.
As of the 2022 American Community Survey, Cathedral City has a permanent population of 51,967.
According to the 2024 Greater Palm Springs Economic Report (CVEP, citing ESRI Business Analyst and U.S. Census data), Cathedral City ranks as the eighth largest city in Riverside County by population and the fourth highest in taxable retail sales in the Coachella Valley (2023).
Strategically located approximately 110 miles east of Los Angeles and 115 miles northeast of San Diego, Cathedral City shares borders with Palm Springs to the west and Rancho Mirage to the east. The city’s Local Hazard Mitigation Plan Update
15 growth has been strongly influenced by its proximity to major transportation corridors, particularly Interstate 10, which supports regional access and economic connectivity.
Cathedral City has demonstrated a commitment to revitalization and economic development, with targeted investments in downtown redevelopment, green space expansion, and public infrastructure.
These efforts have supported the city’s business environment and quality of life. Signature community events-such as the Cathedral City Hot Air Balloon Festival (celebrating its 10th year in 2024), the Taste of Jalisco Festival, and LGBTQ+ Days -underscore the city’s cultural vibrancy and inclusive civic identity.
The Agua Caliente Band of Cahuilla Indians continues to play a vital role in the region. The Tribe’s reservation encompasses approximately 31,610 acres, including parts of Cathedral City, Palm Springs, and Rancho Mirage, as well as unincorporated areas of Riverside County. The Tribe partners with municipalities across the region to coordinate on land use, infrastructure, and cultural preservation, sustaining both economic and heritage priorities across its ancestral lands.
2.3 Climate
Cathedral City is located in the Coachella Valley, approximately 115 miles inland from the Pacific Ocean, and experiences a hot desert climate (BWh) under the Köppen climate classification system.
The city lies within the Colorado Subdivision of the Sonora n Desert, located in the northwestern portion of one of North America’s most arid and biologically diverse desert regions. This area is characterized as a hot and dry subtropical desert, with extreme summer temperatures, high solar exposure, and minimal annual precipitation.
This climate is marked by long, extremely hot summers and mild, brief winters, with very limited precipitation throughout the year. The city’s summers bring some of the hottest temperatures in California, with average high temperatures reaching 107°F (42°C ) in July and August, while peak summer heatwaves frequently exceed 115°F (46°C). Nighttime lows during these extreme heat events can remain above 80°F (27°C), further intensifying the risk of heat -related illnesses and power grid stress. Winters, in contr ast, are much milder, with average high temperatures of approximately 71°F (22°C) in January, and low temperatures ranging between 44°F (7°C) and 50°F (10°C).
Cathedral City also has one of the highest annual sunshine rates in the United States, averaging approximately 348 sunny days per year, making it one of the sunniest locations in the country.
Local Hazard Mitigation Plan Update
16 Annual precipitation in Cathedral City is very limited, with the city receiving an average of only 5 inches (127 mm) of rainfall per year, making it one of the driest cities in Southern California. Rainfall is highly seasonal, occurring almost exclusively between November and March, with January being the wettest month, though precipitation levels even during this period are typically below an inch per month on average. Summers are almost entirely dry, though occasional monsoonal moisture in late summer can bring brief but intense thunderstorms, sometimes leading to localized flash flooding.
While Cathedral City does not experience the marine layer clouds that are common in coastal Southern California, its proximity to the San Jacinto and Santa Rosa Mountains does allow for occasional cool evening breezes, which can provide some relief during the extreme summer heat. Additionally, the city is periodically affected by Santa Ana winds, which typically occur in fall and winter. These warm, dry winds originate from inland areas, raising temperatures while significantly lowering humidity, which can exacerbate wildfire risks across the region.
Despite the city’s arid environment, localized flash flooding remains a hazard, particularly during rare but intense storms. Heavy rainfall from monsoonal moisture or atmospheric disturbances can overwhelm desert soils and drainage systems, leading to loca lized flooding. Buildings in 40 out of 51 census tracts in Cathedral City are at significant risk of surface (pluvial) and riverine (fluvial) flooding.
Approximately 71% of buildings in Cathedral City are at some level of risk from flooding, including both surface (pluvial) flooding and riverine (fluvial) flooding.
Month Avg High (°F) Avg Low (°F)
January 71 45
February 75 48
March 81 52
April 88 58
May 95 65
June 104 73
July 108 81
August 107 80
September 102 74
October 91 63
November 78 51
December 69 44
Month Avg Precipitation (inches)
January 1.18
February 1.09
Local Hazard Mitigation Plan Update
17 Month Avg Precipitation (inches)
March 0.63
April 0.15
May 0.03
June 0.01
July 0.18
August 0.41
September 0.22
October 0.24
November 0.31
December 0.79
Average monthly high and low temperatures and precipitation for Cathedral City, CA, based on 30-year climate normals (1991–2020) from the NOAA National Centers for Environmental Information (NCEI) and validated with data from Weather Spark and U.S. Climate Data for nearby Palm Springs:
Local Hazard Mitigation Plan Update
18 2.4 Climate Change
Cathedral City is projected to experience significant increases in temperature due to climate change.
According to the Fifth National Climate Assessment (2023), average annual temperatures across California are expected to rise by 5°F to 8°F (2.8°C to 4.4° C) by mid -century relative to historical baselines. Given that Cathedral City already experiences extreme summer temperatures, often exceeding 105°F (40°C), this warming trend is expected to result in more frequent and prolonged heatwaves, with the number of days surpassing 110°F (43°C) increasing substantially. By 2050, projections indicate that Cathedral City could experience an average of 32 days per year above 111.9°F, compared to just 7 days annually in 1990.
These extreme heat conditions pose serious public health risks, especially for vulnerable populations such as the elderly, children, and those with underlying medical conditions. The urban heat island effect-driven by extensive impervious surfaces, minimal urban canopy, and heat-retaining materials- further intensifies ambient temperatures. Elevated temperatures also drive higher electricity demand for air conditioning, increasing strain on the power grid. A prolonged power outage during extreme heat events could result in severe health and safety consequences.
Climate models also predict increased variability in rainfall, with greater extremes at both ends of the precipitation spectrum. While Cathedral City currently averages approximately 5 inches (127 mm) of rainfall annually-mostly between November and March -future precipitation is expected to occur in more concentrated and intense bursts. Tropical Storm Hilary in August 2023 exemplified this trend.
Although Cathedral City received roughly 3.3 inches of rain over a 24-hour period, local flooding was largely driven by a mudslide over 25 miles away in the San Bernardino Mountains, which clogged the Whitewater River channel and overwhelmed downstream infrastructure.
Cathedral City’s flood risk is heightened by its desert soil composition, which is often compacted and hydrophobic, reducing infiltration and increasing runoff during heavy rain events. According to the City’s Safety Element, the projected 100-year 24-hour storm for the planning area is 5.42 inches of rain, emphasizing the importance of resilient stormwater infrastructure. Historic events, such as the 1939 storm that dropped 6.45 inches over Indio in 6 hours, and the 1976 storm caused by Tropical Storm Kathleen, which brought 6.81 inches to valley areas and over 14 inches to adjacent mountains, further illustrate the region’s exposure to rare but intense storm systems.
While total annual precipitation may not change significantly, the frequency and duration of droughts are expected to increase. Since 2000, the Whitewater River watershed has experienced some level of Local Hazard Mitigation Plan Update
19 drought in 80% of monitored weeks, with 17% classified as Extreme or Exceptional Drought.
Simultaneously, inconsistent snowpack from the Sierra Nevada and Rocky Mountain ranges, major sources of imported water for Southern California, pose long -term challenges to water security and may necessitate expanded conservation, new supply infrastructure, and drought resilience investments Rising temperatures are also expected to worsen local air quality, especially through increased formation of ground -level ozone, which is exacerbated by heat and sunlight. Cathedral City, which already faces air quality challenges from regional pollution sources, may see an increase in respiratory and cardiovascular ailments such as asthma and bronchitis.
Though Cathedral City is not located within a Very High Fire Hazard Severity Zone, climate change is projected to increase the frequency and intensity of wildfires across California. Smoke from these fires can travel long distances, and the Coachella Valley is increasingly affected by degraded air quality from fine particulate matter (PM2.5) during regional fire events, posing a secondary climate -related health hazard to the city’s residents.
2.5 Demographics
Cathedral City experienced sustained population growth throughout the second half of the 20th century, driven by regional expansion across the Coachella Valley and the city's relative affordability compared to neighboring resort communities such as Palm Sp rings and Rancho Mirage. Residential development accelerated in the 1990s and early 2000s in response to growing housing demand across Southern California. However, the pace of growth began to slow during the 2010s due to rising housing costs, economic shifts, and broader demographic trends.
Between 2000 and 2023, Cathedral City’s average annual population growth was approximately 0.3%, reflecting a more modest increase than in previous decades. The COVID -19 pandemic and related economic disruptions between 2020 and 2022 contributed to a temporary decline in population. During that period, Cathedral City experienced a population decrease of approximately 2.8%, consistent with broader regional trends, as many residents relocated to more affordable inland areas or out of state.
According to the 2024 Greater Palm Springs Economic Report (CVEP, citing ESRI Business Analyst and California DOF), Cathedral City’s estimated population in 2024 is 52,494, down slightly from the 2020 Census count of 54,676 but consistent with the state’s post-pandemic recovery projections.
Local Hazard Mitigation Plan Update
20 Population and Racial/Ethnic Composition
Cathedral City is among the most ethnically diverse cities in the Coachella Valley. According to the 2022 ACS 5 -Year Estimates and the CVEP 2024 report, Hispanic or Latino residents represent the majority of the population. The city’s population profile is summarized below:
Population Overview (2024 Estimate)
• Total Population: 52,494
• Sex:
• Male: 51.6%
• Female: 48.4%
• Age Distribution:
• Under 18 years: 20.2%
• 65 years and over: 18.0%
Race and Hispanic Origin
• White (Non-Hispanic): 29.7%
• Hispanic or Latino (of any race): 58.9%
• Black or African American: 1.9%
• American Indian and Alaska Native: 2.0%
• Asian: 6.9%
• Native Hawaiian or Other Pacific Islander: 0.3%
• Two or More Races: 0.6%
Educational Attainment (Age 25 and Older)
• High school graduate or higher: 80.9%
• No high school diploma: 17.0%
• High school or GED only: 30.0%
• Bachelor’s degree or higher: 28.0%
• Bachelor’s degree or higher (confirmed in ACS): 25.8% Income and Economy
As of 2024, Cathedral City’s estimated median household income is $65,462, while the per capita income stands at $33,408, based on ESRI Business Analyst and ACS 2022 data.
Local Hazard Mitigation Plan Update
21 Historically, Cathedral City's economy has been closely tied to tourism, hospitality, and service-sector employment, owing to its proximity to Palm Springs and other resort destinations. In recent years, however, the city has sought to diversify its economic base by promoting sectors such as:
• Retail trade and logistics
• Construction and real estate development
• Renewable energy and clean-tech investments
2.6 Housing and Development
Incorporated in 1981, Cathedral City’s early housing stock reflected the region’s expansion as a residential community supporting nearby resort hubs like Palm Springs. By the mid -20th century, development primarily featured modest single -family ranch -style homes, catering to working -class families drawn to the affordability of the Coachella Valley and the employment base in service and hospitality industries. These homes often included open floor plans and outdoor features well-suited to the desert climate.
Substantial residential expansion occurred during the 1980s and 1990s, during which Cathedral City emerged as a major population center within the valley. Housing types diversified to include multi - family developments -such as duplexes, apartments, and town homes-driven by demand for more affordable and varied housing options. By 2000, the city’s population exceeded 42,000, and residential development accelerated to meet demand.
By 2020, Cathedral City had an estimated 20,000 housing units, encompassing a mix of single -family homes, condominiums, and rental properties. Its relative housing affordability compared to neighboring cities such as Palm Springs made it increasingly attra ctive for middle -income families, retirees, and seasonal residents.
Current Housing Market Trends (2024–2025)
As of early 2025, Cathedral City’s housing market reflects broader Southern California trends: strong post-pandemic price escalation, constrained supply, and affordability concerns. According to the TownCA February 2025 Desert Housing Report, the median ho me price (MHP) in Cathedral City reached $528,000, a sharp increase from prior years and a 51% increase in value since 2020, per the Zillow Home Value Index (ZHVI) data cited in the CVEP 2024 Economic Report.
Local Hazard Mitigation Plan Update
22 Despite these gains, Cathedral City remains more affordable than many Coachella Valley cities - especially Palm Desert, Rancho Mirage, and Indian Wells. This price advantage has continued to support demand from first-time buyers and moderate-income households. However, rising costs have introduced new affordability challenges.
Rental Market and Tenure
The rental market remains strong, supported by proximity to employment centers, retail amenities, and tourism. As of early 2024, the average rent for a one -bedroom apartment in Cathedral City is approximately $1,450/month, maintaining the city’s status as one of the more accessible rental markets in the valley. Owner-occupancy has modestly increased in recent years. According to ACS 2022 5-Year Estimates, approximately 58% of housing units are owner-occupied, while 42% are renter-occupied.
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23 Local Hazard Mitigation Plan Update
24 Housing Characteristics and Affordability
Cathedral City’s residential areas offer a blend of mid-century subdivisions and newer master-planned communities, many of which cater to retirees, snowbirds, and second-home buyers. Drought-tolerant landscaping and energy -efficient retrofits are common fe atures, aligning with regional conservation goals.
However, rising housing costs have increased the financial burden for both renters and homeowners.
The median selected monthly owner cost (SMOC) with a mortgage is estimated at $2,150, while the median gross rent is approximately $1,450, as reported by the ACS and corroborated in local housing reports.
Seasonal Housing and Vacancy
Cathedral City maintains a significant share of seasonal and vacation housing, a reflection of its role as a second-home destination. As of 2019, approximately 20.3% of housing units were classified as vacant, with most designated for seasonal, recreational, or occasional use, based on ACS data.
Housing and Occupancy Data – 2023 Estimates
Metric Value
Total households 18,250
Owner-occupied housing rate 58%
Median home price (2025) $528,000
Median selected monthly owner costs $2,150
Median gross rent $1,450
Persons per household 3.2
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25 2.7 Economy
Cathedral City maintains a diverse and evolving economy, shaped by its role as a residential and service-oriented community within the Coachella Valley. While not a major tourism destination in the same way as Palm Springs, Cathedral City’s economy is infl uenced by regional tourism through its sizable hospitality and service workforce. The city’s proximity to major resort destinations contributes to job creation in food service, accommodations, entertainment, and support services.
Historically, Cathedral City's economic foundation was rooted in retail, hospitality, and residential development. Over time, the city has broadened its economic base to include healthcare, construction, real estate, and-more recently-logistics and light manufacturing.
The expansion of the Palm Springs International Airport in 2024 positions Cathedral City for potential inclusion in a regional Foreign Trade Zone (FTZ). This designation could support logistics, warehousing, and light manufacturing activities, particularly for companies seeking tariff reductions and streamlined customs processes. Development interest in last -mile delivery and regional distribution centers has increased, spurred by e-commerce growth following the COVID-19 pandemic.
Tourism and Hospitality
Tourism and hospitality continue to influence Cathedral City's economy, but primarily through employment, not as a destination driver. The city supports a workforce employed in nearby resort hubs and contributes to the region's service economy. Local events such as the Cathedral City International Hot Air Balloon Festival, LGBTQ+ Days, and venues such as the Mary Pickford Theatre, CVRep Theater, and the Perez Art District provide important cultural and recreational amenities that enhance quality of life and attract visitors, particularly for arts and entertainment.
As of 2024, approximately 3,800 workers are employed in accommodation and food services and arts, entertainment, and recreation, accounting for roughly 15.9% of the local workforce. While Cathedral City does not function as a core tourism hub, this sector remains an essential part of its employment landscape.
Retail and Commercial Services
Retail is a pillar of Cathedral City’s economy, particularly in terms of tax revenue generation. The city serves as a commercial hub for eastern Coachella Valley communities, anchored by regional shopping centers along East Palm Canyon Drive, Ramon Road, a nd the Cathedral City Auto Center -one of the largest automotive sales clusters in the valley.
Local Hazard Mitigation Plan Update
26 Auto sales, in particular, are a cornerstone of the city’s retail tax base. Recognizing the competitive nature of the auto industry, the city is conducting a SWOT (Strengths, Weaknesses, Opportunities, Threats) analysis in collaboration with local dealersh ips to bolster sector resilience amid regional and online competition.
In 2024, the retail sector employed approximately 2,700 workers, accounting for 11.3% of the city’s total employment. The city continues to pursue commercial revitalization efforts, especially in the Downtown Core and East Palm Canyon corridor, through cap ital improvement projects and retail diversification strategies.
Healthcare and Social Services
The healthcare and social services sector is among the fastest-growing in Cathedral City. A combination of population aging and regional healthcare investment has led to the expansion of medical offices, outpatient clinics, and senior care facilities.
Major healthcare anchors in the surrounding area include Eisenhower Health (Rancho Mirage), Desert Regional Medical Center (Palm Springs), John F. Kennedy Memorial Hospital (Indio), and services coordinated through the Desert Healthcare District.
As of 2024, approximately 3,300 workers are employed in the healthcare and social assistance sector, representing 13.8% of the workforce. Continued growth is anticipated due to demographic trends and regional healthcare demand.
Construction and Real Estate
The construction sector plays a central role in Cathedral City’s economy, driven by housing development, commercial expansion, and infrastructure investment. Housing demand from full -time residents, retirees, and seasonal homeowners -attracted by relatively lower prices compared to Palm Springs or Rancho Mirage -has sustained growth in both the residential and commercial building sectors.
As of 2024, approximately 2,100 workers are employed in construction, accounting for 8.8% of local jobs. The real estate sector -including leasing, property management, and brokerage -continues to benefit from demand across both rental and owner-occupied housing markets.
Logistics, Warehousing, and Manufacturing
Local Hazard Mitigation Plan Update
27 Post-pandemic shifts in consumer behavior have increased demand for logistics and distribution facilities, positioning Cathedral City to attract investment in last-mile delivery, warehousing, and light industrial development.
While still a smaller portion of the total economy, the transportation, warehousing, and utilities sector employs around 1,100 workers (4.6%), and manufacturing employs 1,400 workers (5.9%) as of 2024.
These sectors are expected to grow, especially if Cathedral City secures an FTZ designation and further develops its industrial land base.
Industry Breakdown: Cathedral City Economy (2024)
Industry Number of Jobs Percent of Workforce (%)
Accommodation and Food Services 3,725 15.6%
Retail Trade 2,700 11.3%
Educational Services, and Healthcare and Social Assistance 3,300 13.8% Construction 2,100 8.8%
Manufacturing 1,400 5.9%
Wholesale Trade 750 3.1%
Transportation and Warehousing, and Utilities 1,100 4.6% Information 300 1.3%
Finance and Insurance, and Real Estate and Rental Leasing 1,200 5.0% Professional, Scientific, and Management Services 1,500 6.3% Arts, Entertainment, and Recreation 3,800 15.9%
Other Services (except Public Administration) 1,300 5.4% Public Administration 950 4.0%
2.8 Infrastructure
Electricity and Natural Gas
Electricity service in Cathedral City is provided by Southern California Edison (SCE), which maintains a regional power distribution network for the Coachella Valley. This includes four substations and transmission infrastructure along major corridors such as Date Palm Drive, Landau Boulevard, and Dinah Shore Drive. The system features both overhead and underground lines to serve homes, businesses, and public facilities. SCE conducts routine five - and ten-year load forecasting to identify grid reinforcement and service expansion needs.
Natural gas service is provided by Southern California Gas Company (SoCalGas). High -pressure transmission pipelines enter the region north of Interstate 10, where gas is distributed via medium - Local Hazard Mitigation Plan Update
28 pressure lines throughout the city. Primary gas corridors include Vista Chino, Date Palm Drive, Varner Road, East Palm Canyon Drive, and Mountain View Road. Natural gas supports residential, commercial, and industrial energy needs across Cathedral City.
Water Infrastructure
Water service in Cathedral City is delivered by two special districts: the Coachella Valley Water District (CVWD) and the Desert Water Agency (DWA), depending on the service area. These agencies, not the City, are responsible for water supply infrastructur e investments, operations, and long -term planning.
Water is sourced from the Coachella Valley Groundwater Basin, which is replenished with imported water from the Colorado River (via the Coachella Canal and Colorado River Aqueduct) and from the State Water Project (through a water exchange agreement with M etropolitan Water District). Each agency maintains pipelines, wells, reservoirs, and booster stations to deliver water reliably. Major transmission lines follow key corridors such as Dinah Shore Drive, Ramon Road, and East Palm Canyon Drive.
Water conservation is a shared priority, with both CVWD and DWA offering rebates for drought - tolerant landscaping, smart irrigation systems, and recycled water systems. Groundwater replenishment and recycled water distribution -particularly for non-potable uses like golf courses-are central to regional water sustainability goals.
Wastewater Infrastructure
Wastewater collection is managed by CVWD or DWA, based on service area jurisdiction. CVWD operates Wastewater Reclamation Plant No. 10 (WRP-10) in Palm Desert, which treats effluent from Cathedral City and recycles it for non -potable irrigation. Sewer infr astructure includes trunk lines between 4 and 24 inches in diameter, routed along major roadways.
The Cove Improvement District Sewer and Street Project, launched in 2008, connected hundreds of formerly unsewered homes in the city’s Cove area to the municipal system, replacing aging septic systems. The City enforces connection mandates for all new development.
Road and Highway Network
Cathedral City’s transportation infrastructure is anchored by Interstate 10 and East Palm Canyon Drive (former State Route 111). I-10 interchanges at Date Palm Drive, Bob Hope Drive, and Palm Drive serve Local Hazard Mitigation Plan Update
29 regional and long-haul traffic. Major east-west arterials such as Ramon Road, Dinah Shore Drive, and Gerald Ford Drive support intracity mobility.
The Varner Road corridor, north of I-10, is a critical east-west bypass route vulnerable to flooding and blowsand. The City is actively collaborating with the Coachella Valley Association of Governments (CVAG) to study and improve this corridor, which may function as an alternative route during I -10 closures.
Public Transit
Public transportation is provided by SunLine Transit Agency, which operates regional bus service across the valley. SunLine has introduced hydrogen and battery-electric buses, making Cathedral City part of one of the nation’s cleanest transit fleets. Route connections include Palm Springs, Rancho Mirage, and Indio.
To support active transportation, the City continues to invest in bike lanes, sidewalk upgrades, and safe crossings, particularly along East Palm Canyon Drive.
Stormwater and Flood Control
Cathedral City’s desert setting makes it highly vulnerable to flash flooding. The City’s stormwater infrastructure includes retention basins, storm drains, levees, and natural washes. Flood control investments are primarily led by CVWD and the Riverside County Flood Control and Water Conservation District (RCFCD).
• Eagle Canyon Dam (completed 2015) mitigates upstream flooding that historically affected East Palm Canyon Drive.
• The Cathedral Canyon Wash system conveys floodwaters into the Whitewater River Channel, the region’s principal drainage corridor.
• The Cathedral City Storm Drain Master Plan guides infrastructure upgrades with attention to climate resilience.
Localized stormwater management challenges persist, especially along Dinah Shore Drive and Gerald Ford Drive, where historic road depressions contribute to ponding during storm events.
Following Tropical Storm Hilary in 2023, the Federal Highway Administration awarded the City a grant to reconstruct Date Palm Drive between Vista Chino and Tachevah, which includes stormwater mitigation at the Los Gatos Drive intersection, a chronic floodi ng site. The City is also working with Local Hazard Mitigation Plan Update
30 CVAG on the Varner Road ByPass Study, evaluating mitigation measures needed to ensure Varner Road remains open during flooding and blowsand events. Improvements to Date Palm Drive (north of I-10) are also underway via a separate cooperative design agreement.
Public comments during the LHMP update process identified areas that regularly flood—such as Date Palm Drive near Los Gatos Road and DaVall Road near Century Park —as potential candidates for wetland restoration or conversion to functional green infrastruct ure. These measures could offer cost -effective, low -maintenance alternatives to traditional infrastructure while delivering co-benefits like carbon sequestration, habitat creation, and community cooling.
2.9 Historically Vulnerable Populations
Low-Income Residents
Major Hazards: Extreme Heat, Drought, Earthquake, High Wind/Storms Approximately 15.6% of Cathedral City’s population lives below the poverty line. Limited financial capacity reduces access to preparedness resources, insurance, and safe shelter. Many low -income households reside in older housing stock that may lack insula tion or cooling systems, heightening exposure to extreme heat and seismic risk.
Elderly Individuals
Major Hazards: Earthquake, Power Outages, Infectious Disease
Approximately 18.4% of Cathedral City’s population is over 65, including:\
• 12.1% aged 65–74
• 9.2% aged 75+
Older adults are at increased risk during heatwaves, blackouts, and earthquakes due to mobility limitations, medical dependencies, and social isolation. Emergency planning must prioritize power continuity, cooling centers, and proactive wellness checks.
People with Disabilities
Major Hazards: Earthquake, Power Outages
Local Hazard Mitigation Plan Update
31 Roughly 12.8% of residents have a disability, encompassing physical, sensory, and cognitive impairments. Disasters can disrupt mobility aids, medical devices, and communications systems.
Accessible shelters and inclusive alert systems are critical.
Minority Communities
Major Hazards: Earthquake, Fire, Power Outage
Hispanic or Latino residents make up 58.9% of the population (CVEP). Language barriers, limited healthcare access, and economic disparities increase disaster vulnerability. Multilingual alerts and culturally competent outreach are essential.
Unhoused Populations
Major Hazards: Extreme Heat, Drought, Fire, High Wind/Storms, Infectious Disease/Pandemic
As of the latest Point-in-Time Count, Cathedral City has 82 unhoused individuals, a 78% increase since 2018. Exposure, limited medical access, and proximity to transportation corridors or fire -prone open spaces heighten risks.
The Cathedral City Police Department Homeless Liaison Program partners with a Riverside County public health worker to provide outreach and coordinate with emergency services during extreme events.
Social Vulnerability Index
The Social Vulnerability Index (SOVI) is a critical tool in assessing community resilience to hazards.
Developed by the Centers for Disease Control and Prevention (CDC) and the Agency for Toxic Substances and Disease Registry (ATSDR), the SOVI ranks census tracts based on 15 social factors contributing to vulnerability. These include income, age, disability status, housing type, transportation access, and minority status. The higher the index score (ranging from 0 to 1), the greater the vulnerability of a community.
Local Hazard Mitigation Plan Update
32 Population
Group
Soi
Score
(0-1)
Description of Vulnerability
Low-Income
Residents 0.81
Many residents live in older housing that lacks resilience to seismic events, extreme heat, and flooding. Limited financial resources reduce their ability to evacuate or access recovery services.
Elderly
Individuals
(65+)
0.84 Many elderly residents have mobility and health challenges that limit their ability to evacuate during disasters. They are also more likely to rely on power -dependent medical devices, increasing vulnerability to power outages. Social isolation exacerbates risks during emergencies.
People with
Disabilities 0.85
Disabilities affecting mobility, sensory, or cognitive function can hinder emergency response, evacuation, and medical access. Power outages and transportation disruptions further heighten risks.
Minority
Communities 0.79
Many minority communities experience language barriers and economic disadvantages, impacting disaster response and recovery. Targeted outreach and multilingual emergency resources are essential to reduce these disparities.
Unhoused
Populations 0.90
Homeless individuals face extreme risks from heat, fire, storms, and poor air quality.
Many lack access to emergency shelter, medical care, and disaster communication services.
SECTION 3 – HAZARD IDENTIFICATION AND RISK
ASSESSMENT
Element B: Risk Assessment Requirements
B1. Does the plan include a description of the type, location and extent of all natural hazards that can affect the jurisdiction? Does the plan also include information on previous occurrences of hazard events and on the probability of future hazard events? (Requirement 44 CFR § 201.6(c)(2)(i))
3.1 Introduction
Purpose of the Risk Assessment
The risk assessment process aligns with federal and state regulatory requirements, including the Disaster Mitigation Act of 2000 (DMA 2000) (44 CFR §201.6), which mandates that local jurisdictions conduct a comprehensive, forward-looking risk assessment to maintain eligibility for FEMA’s Hazard Local Hazard Mitigation Plan Update
33 Mitigation Assistance (HMA) grant programs. Additionally, the assessment incorporates climate adaptation planning requirements outlined in FEMA’s 2023 Local Mitigation Planning Policy Guide and California Government Code §65302(g), ensuring integration wit h state -mandated safety and resilience planning.
From a technical perspective, the risk assessment evaluates hazard probability, severity, and cascading impacts using a multi-layered analytical framework that integrates historical disaster data and FEMA disaster declarations as well as climate projections and future risk modeling.
FEMA Requirements and Compliance
The City of Cathedral City’s risk assessment and hazard mitigation planning efforts are guided by federal regulations established under the Disaster Mitigation Act of 2000 (DMA 2000) (Public Law 106- 390), which amended the Robert T. Stafford Disaster Relief and Emergency Assistance Act (42 U.S.C. 5121 et seq.). These regulations, codified in Title 44 of the Code of Federal Regulations (CFR) Part 201, require local jurisdictions to develop and maintain a FEMA -approved Local Hazard Mitigation Plan (LHMP) to remain eligible for federal hazard mitigation funding, including grants under the Hazard Mitigation Grant Program (HMGP) and Flood Mitigation Assistance (FMA) Program, among others.
To achieve compliance with 44 CFR §201.6, this plan includes:
• A Risk Assessment (§201.6(c)(2)) – A comprehensive analysis of hazard exposure, vulnerability, and potential impacts on people, property, and critical infrastructure.
Relationship to Other Planning Elements
Hazard identification and risk assessment is a foundational component of the City of Cathedral City’s comprehensive planning framework, ensuring that hazard mitigation strategies are fully integrated into broader land use planning, emergency management, in frastructure investment, environmental sustainability, and climate adaptation efforts. This alignment strengthens the City’s ability to reduce disaster risks, enhance community resilience, and optimize access to federal and state funding opportunities.
Federal and state regulations, including FEMA’s Local Hazard Mitigation Plan (LHMP) requirements (44 CFR §201.6) and California Government Code §65302(g) (as amended by SB 379 and SB 1035), require jurisdictions to incorporate hazard mitigation and climate adaptation strategies into their General Plan Safety Element and other municipal planning documents. By fostering consistency across planning efforts, the City proactively integrates risk reduction principles into growth and development decisions, ensuring a safer, more resilient future.
Local Hazard Mitigation Plan Update
34 Integration with Local and Regional Plans
The City’s risk assessment is closely coordinated with the following local and regional planning efforts, ensuring a holistic, cross-sectoral approach to hazard mitigation and climate resilience:
General Plan Safety Element
• Mandated by SB 379 and SB 1035, the Safety Element incorporates hazard risk assessments, climate adaptation strategies, and emergency preparedness measures to reduce vulnerabilities in the built environment.
• Regular updates ensure that the Safety Element remains aligned with the LHMP, reflecting evolving risks such as wildfire, flooding, seismic activity, and extreme heat. • Integration with land use planning promotes smart growth strategies, minimizing exposure to high-risk areas.
• In coordination with CVAG, Riverside County Flood Control and Water Conservation District, and neighboring jurisdictions such as Palm Springs, Rancho Mirage, and Desert Hot Springs, Cathedral City is participating in regional roadway flooding and blowsand hazard mitigation studies. This collaboration has resulted in the initiation of three regional roadway improvement projects designed to mitigate 100-year flood event–related roadway shutdowns.
• The City is an active participant in the CVAG Interstate 10 Bypass Study, which is assessing hazards and mitigation requirements for an alternative cross-valley (west–east) transportation route in the event of a prolonged I-10 closure.
Emergency Operations Plan (EOP)
• The City’s EOP establishes operational protocols for disaster response and recovery, ensuring effective coordination among Cathedral City departments, Riverside County Emergency Management Department, CVAG, California Office of Emergency Services (Cal OES), and local nonprofit and community-based organizations.
• The LHMP risk assessment informs:
• Evacuation planning for at-risk populations,
• Resource allocation for emergency services, and
Local Hazard Mitigation Plan Update
35 • Emergency communication strategies to enhance public safety and ensure continuity of services.
Capital Improvement Plan (CIP)
• The CIP prioritizes critical infrastructure investments that reduce vulnerability to identified hazards, with risk-informed selection criteria. Investments include:
• Stormwater management and retention basin upgrades,
• Seismic retrofits of public safety facilities and city-owned buildings, • Roadway reconstruction projects that incorporate resilience to flooding and blowsand, • Microgrid readiness and backup power for emergency shelters and critical infrastructure.
• Projects are implemented in coordination with CVWD, RCFCD, SCE, and adjacent cities, particularly where infrastructure spans jurisdictional boundaries.
Zoning and Building Codes
• The City’s Code of Ordinances incorporates hazard mitigation and resilience into land use, zoning, and construction standards.
• The risk assessment directly informs:
• Seismic design standards for new and substantially improved structures, • Wildland-urban interface (WUI) building requirements and fire -resistance standards to reduce exposure to wildfire and structure fires.
• Cathedral City is actively working on a comprehensive update to its zoning code, scheduled for completion in 2026, to align land use policy with climate and hazard risk considerations.
• The City currently uses the 2022 California Building Code (CBC) and is preparing for adoption of the 2025 CBC, which will go into effect in 2026, to ensure building practices reflect the latest seismic, energy, and fire safety requirements.
Summary of Interagency Coordination
Cathedral City integrates LHMP priorities through formal collaboration with:
• Coachella Valley Association of Governments (CVAG) – flood control, active transportation, and I-10 bypass planning,
• Riverside County Emergency Management Department – emergency preparedness and incident coordination,
Local Hazard Mitigation Plan Update
36 • Riverside County Flood Control and Water Conservation District (RCFCD) – regional stormwater planning and infrastructure investment,
• Coachella Valley Water District (CVWD) and Desert Water Agency (DWA) – water and wastewater resilience strategies,
• Southern California Edison (SCE) and SoCalGas – energy reliability and hazard mitigation, • Neighboring cities (Palm Springs, Rancho Mirage, Desert Hot Springs) – mutual aid, cross - jurisdictional infrastructure planning, and shared mitigation priorities, • Cal OES – for funding, technical assistance, and plan integration guidance at the state level.
Methodology and Data Sources
The risk assessment for Cathedral City utilizes a comprehensive, multi-layered approach that integrates historical disaster data, geospatial analysis, probabilistic risk modeling, and climate projections. This methodology ensures that mitigation planning i s data -driven, forward -looking, and aligned with evolving hazard conditions specific to the Coachella Valley.
The risk assessment follows FEMA’s Local Hazard Mitigation Plan (LHMP) requirements (44 CFR §201.6) and incorporates California-specific regulations, including:
• California Government Code §65302(g) (SB 379, SB 1035): Requires jurisdictions to integrate hazard mitigation and climate adaptation strategies into the General Plan Safety Element. • California Adaptation Planning Guide (2020): Developed by Cal OES to provide a framework for assessing climate vulnerabilities and future hazard risks. • Riverside County Multi -Jurisdictional Hazard Mitigation Plan (MJLHMP) (2023): Provides county-wide risk assessments for hazards such as wildfire, flooding, drought, and extreme heat.
• 2023 California State Hazard Mitigation Plan (SHMP): Offers statewide hazard profiles and risk assessments, including projections for wildfire, flooding, drought, extreme heat, earthquakes, and other climate-driven hazards.
By integrating local, regional, and state-level risk assessment frameworks, Cathedral City ensures that mitigation planning is comprehensive, equity -focused, and aligned with best practices in climate resilience.
Historic Disaster Declarations
Given the size and geographic diversity of Riverside County, this LHMP will not provide a list of all disaster declarations for the county. Historic disaster declarations may be found by specific hazard.
Local Hazard Mitigation Plan Update
37 Consideration of Future Climate Conditions and Changing Risks Recognizing the increasing frequency and severity of climate -related hazards, the HIRA incorporates scientific projections from regional, state, and national climate assessments, ensuring that mitigation strategies remain adaptive to future conditions.
Key climate risk projections include:
• Riverside County Climate Vulnerability Assessment (2023): Projects:
• A significant increase in extreme heat events, with Cathedral City experiencing over 30 days per year above 111°F (44°C) by 2050.
• Rising wildfire risk, with 30% of all Cathedral City properties facing some level of exposure over the next 30 years.
• Greater intensity of inland flooding due to sporadic heavy rainfall events and constrained stormwater infrastructure.
• California’s Fourth Climate Change Assessment (2018): Provides downscaled climate modeling for temperature rise, drought severity, and extreme weather variability through 2100. • First Street Foundation’s Climate Risk Data (2024): Includes probabilistic modeling for flooding, extreme heat, and air quality deterioration, supporting local infrastructure resilience planning.
• Cathedral City General Plan and Safety Element (2024 Update): Aligns land use policies with projected wildfire, earthquake, and flood risk exposure, ensuring compliance with SB 379 and SB 1035.
• Southern California Association of Governments (SCAG) Regional Climate Adaptation Framework (2020): Establishes regional resilience strategies for:
• Drought mitigation.
• Transportation adaptation.
• Energy grid reliability.
• Coachella Valley Association of Governments
• Flooding & Blowsand Risk Assessment and Improvement Plan for Western Coachella Valley: identifies hazards and risk and provides mitigation measures within the region and the city.
• CVAG Varner Road I -10 Bypass Feasibility Study: identifies hazards and risk and provides mitigation measures within the region and the city.
Local Hazard Mitigation Plan Update
38 3.2 Identifying Hazards
Definition of Hazards
For the purposes of the City of Cathedral City’s Local Hazard Mitigation Plan (LHMP), hazards are defined as natural, technological, or human-caused events that have the potential to cause loss of life, injury, property damage, economic disruption, and env ironmental degradation. These hazards can be categorized into two primary types:
Chronic hazards are long -term, ongoing conditions that gradually impact the community over time.
These include extreme heat, drought, air quality degradation, and water resource shortages, which accumulate over years or decades and exacerbate vulnerabilities.
Acute hazards are sudden -onset, high -impact events that occur rapidly with little warning. These include earthquakes, flash floods, wildfires, hazardous materials spills, high -wind events, and power outages, which can cause immediate destruction and necessitate emergency response efforts.
Methodology for Hazard Selection
Hazards for the 2025 LHMP were determined by examining hazards previously analyzed in the most recent LHMP revision as well as additional hazards identified by the City through internal solicitation from participants in the internal interview process for the LHMP.
The National Risk Index identifies 18 specific hazards that may affect communities across the United States. Not all of these hazards were included in the LHMP update. Each hazard is addressed below along with justifications as to why they may not have been included.
Hazard Included Explanation
Avalanche No The City of Cathedral City does not experience significant snowfall; therefore, this hazard Is not applicable to the City.
Coastal
Flooding
No The City of Cathedral City does not have any coastline; therefore, this hazard is not applicable to the City.
Cold Wave No Southern California is known for its temperate and warm climate; therefore, this hazard is not applicable to the City.
Drought Yes This hazard is included in the LHMP.
Earthquake Yes This hazard is included in the LHMP.
Local Hazard Mitigation Plan Update
39 Hail No This hazard was not determined to be significant enough to include in the LHMP. Related hazards are included as “High wind/storms”.
Hazard Included Explanation
Heat Wave Yes This hazard is included under “Extreme Heat”.
Hurricane No Hurricanes rarely impact Southern California; therefore, this hazard is not applicable to the City. Similar impacts are examined under “Flooding” and “High wind/storms”.
Ice Storm No Southern California is known for its temperate and warm climate; therefore, this hazard is not applicable to the City.
Landslide Yes This hazard is included.
Lightning No This hazard was not determined to be significant enough to include in the LHMP. Related hazards are included as “High wind/storms”.
Riverine
Flooding
Yes This hazard is included as “Flooding”
Strong Wind Yes This hazard is included as “High wind/storms”.
Tornado No Tornadoes are extremely rare in Southern California; therefore, this hazard is not applicable to the City.
Tsunami No The City of Cathedral City does not border a major body of water and is sufficiently inland to be insulated from immediate tsunami impacts; therefore, this hazard is not applicable to the City.
Volcanic
Activity
No There are no active volcanos in Southern California; therefore, this hazard is not applicable to the City.
Wildfire Yes This hazard is included under “Fire”.
Winter
Weather
No Southern California is known for its temperate and warm climate; therefore, this hazard is not applicable to the City.
To ensure consistency with best practices, regulatory requirements, and evolving hazard conditions, the Planning Team conducted a comprehensive review of hazard planning documents, integrating scientific data and jurisdictional priorities from the following sources:
Federal Hazard Planning Documents
• FEMA Local Hazard Mitigation Plan (LHMP) Guidance (44 CFR §201.6): Defines requirements for hazard identification and risk assessment to maintain eligibility for federal hazard mitigation funding.
• FEMA National Risk Index (2023): Provides a nationwide ranking of hazard exposure, including earthquakes, wildfires, flooding, and extreme heat, which are highly relevant to Cathedral City.
Local Hazard Mitigation Plan Update
40 • NOAA National Centers for Environmental Information (NCEI) Storm Events Database:
Documents historical extreme weather events, including heatwaves, monsoonal storms, and atmospheric river-driven flooding affecting the Coachella Valley.
• United States Geological Survey (USGS) Earthquake Hazards Program: Identifies fault systems, seismic activity, and ground shaking potential impacting Cathedral City, particularly the San Andreas Fault and nearby secondary fault systems.
State of California Hazard Planning Documents
• 2023 California State Hazard Mitigation Plan (SHMP): Provides a statewide risk assessment, including wildfire, flooding, earthquakes, drought, and extreme heat, with specific implications for Riverside County and the Coachella Valley.
• California’s Fourth Climate Change Assessment (2018): Uses downscaled climate models to project future hazard conditions, such as increased wildfire risk, more frequent and prolonged heat waves, and changing precipitation patterns contributing to flood and drought risk. • California Department of Forestry and Fire Protection (CAL FIRE) Fire Hazard Severity Zone Map (2022): Identifies areas of elevated fire hazard severity, particularly in wildland -urban interface (WUI) areas surrounding Cathedral City.
• California Adaptation Planning Guide (2020): Establishes a framework for integrating climate adaptation and resilience strategies into local hazard mitigation planning.
Regional and Local Hazard Planning Documents
• Riverside County Multi-Jurisdictional Hazard Mitigation Plan (MJLHMP) (2023): Establishes countywide hazard assessments and highlights multi -jurisdictional risk mitigation priorities that align with Cathedral City.
• Cathedral City General Plan Safety Element (2024 Update): Integrates hazard mitigation, land use planning, and emergency preparedness, ensuring compliance with SB 379 and SB 1035. • First Street Foundation Risk Factor Data (2024): Provides probabilistic modeling for flood, wildfire, and extreme heat risks at the parcel level, supporting localized risk assessment and infrastructure planning.
Methodology
Local Hazard Mitigation Plan Update
41 In January 2025, a hazards and vulnerability assessment workshop was conducted with the City of Cathedral City and with local stakeholders. During the workshop, attendees evaluated the risk of hazards suggested in the course of plan development.
Based in part on elements of the Critical Priority Risk Index, modified for an increased emphasis on future risks using standard climate risk assessment categorization, participants were asked to give their opinion on the assigned scores for each hazard.
This information was used to calculate the Modified Calculated Probability Risk Index score. The CPRI is a common methodology used in hazard mitigation plans to quantify risk. However, it does not give sufficient weight to risks from climate change or other future events.
The Modified CPRI is calculated in the following manner:
((Severity (Present)*0.3)+(Probability (Present)*0.45)+(Severity (Future)*0.3)+(Probability (Future)*0.45))
Hazards Matrix
This LHMP will use the following definitions throughout Section 3 to allow policymakers and planners to use the LHMP to inform City priorities and planning decisions.
Probability Definition
Very Unlikely Less than 5% probability of occurrence
Local Hazard Mitigation Plan Update
42 Unlikely Greater than 5% and less than 30% probability of occurrence Moderate Greater than 30% and less than 60% probability of occurrence Likely Greater than 60% and less than 95% probability of occurrence Very Likely Greater than 95% probability of occurrence
3.3 Hazard Profiles
3.3.1 Extreme Heat
Description
Extreme heat refers to prolonged periods of excessively high temperatures that exceed historical norms for Cathedral City and the surrounding Coachella Valley region. These events are often intensified by low humidity, minimal nighttime cooling, and heat retention in urban areas. The severity of an extreme heat event is influenced not only by absolute temperature values but also by the duration of sustained heat, the presence of warm nighttime temperatures, and the ability of the built and natural environment to dissipate heat effectively. As temperatures remain high for extended periods, the risks to public health, infrastructure, and ecosystems increase, particularly for vulnerable populations such as the elderly, young children, individuals with pre-existing health conditions, and outdoor workers.
Extreme heat presents cascading risks that extend beyond personal discomfort. Heat -related illnesses, including heat exhaustion and heat stroke, become more prevalent as prolonged exposure to high temperatures strains the human body’s ability to regulate h eat. Critical infrastructure is also affected, as increased demand for cooling places stress on the power grid, often leading to rolling blackouts and brownouts. Roadways and railways can suffer physical damage due to heat -induced expansion, while urban wa ter systems experience elevated evaporation rates and greater demand for hydration and cooling. Ecosystems are not immune to these effects, as prolonged extreme heat can contribute to drought conditions, reduce soil moisture, and intensify wildfire risks.
The National Weather Service (NWS) defines extreme heat in terms of both daily maximum temperatures and the heat index, which accounts for the combined effects of heat and humidity on human perception of temperature. The heat index, often referred to as th e "feels like" temperature, plays a critical role in issuing heat-related warnings and advisories. When the heat index exceeds 105°F for two or more consecutive days, the NWS typically issues an Excessive Heat Warning, signaling that Local Hazard Mitigation Plan Update
43 conditions may pose a significant risk to public health. A Heat Advisory is issued at lower thresholds when conditions are expected to cause moderate health risks, particularly for vulnerable populations.
According to Cal -Adapt and regional climate models, extreme heat events in Cathedral City are expected to intensify due to climate change. The key heat metrics include:
• Extreme Heat Days – A day when the daily maximum temperature exceeds the 98th percentile of historical highs (April–October, based on 1961–1990 records).
• Warm Nights – A night when the daily minimum temperature remains above the 98th percentile of historical nighttime lows, reducing the ability of the body to recover from daytime heat stress.
• Extreme Heat Waves – A period of four or more consecutive extreme heat days and warm nights, leading to increased health risks, higher energy demand, and infrastructure strain.
According to climate projections, Cathedral City currently experiences approximately seven days per year with a heat index exceeding 113°F, but this number is expected to increase to 20 days per year by 2050.
Urban areas can experience elevated temperatures due to the Urban Heat Island (UHI) effect, a phenomenon in which built environments absorb and retain heat more than surrounding rural areas.
Surfaces such as asphalt roads, concrete sidewalks, and dark rooftops absorb solar radiation during the day and release heat more slowly at night, leading to higher ambient temperatures. Additionally, limited vegetation and tree canopy coverage reduce opportunities for natural cooling through evapotranspiration. Waste h eat from industrial activity, vehicular emissions, and air conditioning systems further amplifies local temperatures.
In Cathedral City, certain areas exhibit elevated heat exposure due to urban density, high pavement coverage, and limited green space. Studies indicate that daytime maximum temperatures within heat islands can vary by as much as 7°F from surrounding rural areas, and more importantly, these areas retain heat overnight, preventing cooling.
Location and Extent
Extreme heat is a citywide hazard in Cathedral City, affecting all neighborhoods due to the region’s desert climate, the urban heat island (UHI) effect, and projected increases in the frequency and intensity of heat waves due to climate change. The Coachel la Valley experiences approximately 348 sunny days per year, with summer high temperatures regularly exceeding 110°F. These extreme Local Hazard Mitigation Plan Update
44 conditions create significant health and infrastructure risks, particularly for vulnerable populations, older buildings with poor insulation, and neighborhoods with limited tree canopy coverage.
Industrial areas, major transportation corridors, and residential neighborhoods with limited green space are particularly vulnerable to prolonged heat retention and elevated daytime and nighttime temperatures.
Industrial zones and commercial corridors within Cathedral City contribute to significant heat accumulation due to extensive pavement, asphalt, and metal structures that absorb and retain heat well into the evening. These areas lack sufficient tree canopy coverage and vegetation to provide natural cooling, leading to sustained high temperatures that intensify the urban heat
island effect. Additionally, heat generated from industrial activity and vehicular emissions further exacerbates localized temperature increases.
High-traffic corridors such as East Palm Canyon Drive (Highway 111), Date Palm Drive, and Ramon Road contribute to increased localized temperatures. The dark asphalt surfaces of major roadways absorb heat throughout the day, releasing it slowly at night, l imiting cooling and amplifying the heat island effect. The combination of traffic congestion and waste heat from vehicles intensifies this effect, particularly in adjacent residential areas.
Residential areas with low tree canopy coverage, particularly in older neighborhoods and high-density developments, experience prolonged heat stress. Many homes in Cathedral City were built before modern energy efficiency standards and lack proper insulation and cooling systems. As a result, indoor temperatures in these buildings can become dangerously high, posing severe risks to occupants, especially low-income residents who may be unable to afford air conditioning Relationship to Land Use and Development
Land use and urban development patterns play a critical role in Cathedral City’s extreme heat vulnerability. The city’s mix of residential, commercial, and industrial land uses, combined with widespread impervious surfaces, intensifies local temperature increases.
The predominance of hardscaped surfaces in Cathedral City-such as roads, parking lots, and industrial sites-significantly reduces the potential for natural cooling. In commercial districts and industrial zones, high heat retention is exacerbated by the lac k of shade and vegetation. The city’s tourism and hospitality industry, which includes large hotels, resorts, and shopping centers, also contributes to heat retention due to the extensive use of reflective glass and concrete surfaces.
Local Hazard Mitigation Plan Update
45 Transportation infrastructure further amplifies heat retention across the city. Cathedral City is bisected by major roadways, including Highway 111 and Interstate 10, which contribute to heat buildup.
Freeway-adjacent neighborhoods experience compounded he at exposure due to the combination of direct solar radiation on asphalt and emissions from high traffic volumes.
Older residential developments, particularly those built before California’s modern building energy codes, have limited insulation, outdated cooling systems, and roofing materials that absorb rather than reflect heat. These buildings are more susceptible to overheating, increasing energy costs for residents and heightening health risks for those who lack access to adequate cooling. Green spaces such as Panorama Park, Century Park, Ocotillo Park and the soon to be completed Esperanza Park provide some relie f from extreme heat, but Cathedral City’s overall tree canopy coverage is low, further intensifying urban heat stress.
Magnitude and Severity
Unlike some other natural hazards, extreme heat lacks a singular, universally accepted intensity scale, such as the Modified Mercalli Intensity Scale for earthquakes or the Saffir -Simpson Hurricane Wind Scale for hurricanes. Instead, the severity of extrem e heat events is assessed using a combination of temperature thresholds, heat indices, and frequency and duration metrics, which collectively provide a comprehensive measure of the hazard’s magnitude and potential impacts.
National Weather Service (NWS) Heat Index
Local Hazard Mitigation Plan Update
46 The NWS Heat Index is the primary tool used to quantify how hot it "feels" by factoring in both actual air temperature and relative humidity. This index plays a critical role in issuing heat-related alerts and warnings. The NWS issues an Excessive Heat W arning when the heat index surpasses 105°F for at least two consecutive days. A Heat Advisory may be issued when heat index values pose a moderate risk to public health, particularly for vulnerable populations such as the elderly, outdoor workers, and individuals with pre-existing health conditions.
Cal-Adapt Extreme Heat Metrics
California’s Cal-Adapt system, developed by Cal OES and UC Berkeley’s Geospatial Innovation
Facility, provides historical and projected climate data to help communities assess and plan for extreme heat risks. Cal-Adapt defines extreme heat through three primary measurements:
• Extreme Heat Days – A Day when the maximum temperature exceeds the 98th percentile of historical daily highs (based on 1961–1990 data).
• Warm Nights – A night when the minimum temperature remains above the 98th percentile of historical lows for the same period, limiting nighttime cooling and increasing heat stress. • Extreme Heat Waves – A period of four or more consecutive Extreme Heat Days and Warm Nights, significantly increasing health risks, energy demand, and infrastructure stress.
Severity of Extreme Heat
Extreme heat events in Cathedral City are becoming more frequent, prolonged, and intense due to climate change and the urban heat island (UHI) effect. The city, located in the Coachella Valley, experiences extremely high summer temperatures, often exceeding 120°F between June and September . The number of days with temperatures exceeding 113°F is projected to increase from 7 days per year today to 20 days per year by 2050. The UHI effect is exacerbated by the city’s constructed environment, where asphalt, concrete, and other heat -absorbing materials contribute to sustained heat retention, particularly in areas with limited vegetation and tree canopy coverage Health and Infrastructure Impacts
The intensification of extreme heat presents severe risks to human health, critical infrastructure, and economic stability. Prolonged exposure to high temperatures significantly increases the likelihood of heat-related illnesses , including heat exhaustion and heat stroke. Vulnerable populations, such as Local Hazard Mitigation Plan Update
47 elderly residents, low-income households, outdoor workers, and individuals with pre -existing health conditions, are at heightened risk. The healthcare system in Cathedral City is expected to face increased demand for emergency medical services due to rising heat-related conditions.
Extreme heat also places a substantial strain on energy infrastructure . Increased air conditioning use leads to higher electricity demand, raising the likelihood of power outages, rolling blackouts, and grid failures, especially during prolonged heat waves. Cathedral City already experiences significant energy demand for cooling, with 315 cooling days per year today, projected to increase to 326 days per year by 2050.
Additionally, high temperatures accelerate infrastructure deterioration , affecting roads, bridges, and rail systems. Asphalt softening, pavement buckling, and rail track warping are expected to increase, disrupting transportation networks and local economic activities.
Historical Occurrences of Extreme Heat
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Cathedral City and the greater Coachella Valley region have experienced multiple extreme heat events over the past several decades, resulting in increased public health risks, surges in energy demand, and cascading infrastructure failures. The frequency, d uration, and intensity of these heat waves have intensified due to climate change, placing additional stress on vulnerable populations, emergency response systems, and critical infrastructure.
• July 2006 Heat Wave: In July 2006, California experienced one of its most intense and prolonged heat waves, lasting nearly three weeks. Temperatures soared well above 115°F in the Coachella Valley, with Palm Springs recording highs of 121°F . The extreme heat caused Local Hazard Mitigation Plan Update
48 widespread health emergencies, including heat stroke, dehydration, and respiratory distress, particularly among seniors, outdoor workers, and individuals without access to air conditioning. Emergency room visits surged, and the strain on the electrical grid led to rolling blackouts in multiple locations throughout Southern California. • July 2018 Heat Wave: During early July 2018, an intense heat wave struck Southern California, with Palm Springs reaching 120°F and Thermal hitting 121°F. This event resulted in a spike in heat-related illnesses and power disruptions across Riverside County. The combination o f prolonged high temperatures and dry conditions exacerbated wildfire risks, leading to several brush fires in the region.
• August 2020 Heat Wave and Rolling Blackouts: In August 2020, California experienced an extreme heat wave, triggering the state's first rolling blackouts in nearly two decades. Cathedral City, along with the rest of the Coachella Valley, saw temperatures soar beyond 120°F. This event placed unprecedented stress on California’s power grid, with the California Independent System Operator (CAISO) declaring a Stage 3 Emergency due to electricity demand exceeding available supply . Nearly 500,000 residents across the state lost electricity, affecting cooling systems, refrigeration, and critical medical equipment, further endangering vulnerable populations.
• September 2020 Labor Day Weekend Heat Wave: In early September 2020, another record - breaking heat wave struck California. Palm Springs recorded a high of 121°F, matching its all- time record. The extreme temperatures led to increased 911 emergency calls, emergency room visits, and widespread power disruptions. This event also exacerbated air pollution and ground- level ozone formation, leading to higher rates of respiratory illnesses.
Probability and Effects of Future Conditions
Local Hazard Mitigation Plan Update
49 Overall probability over next five years: Likely.
Extreme heat in Cathedral City is projected to intensify in frequency, severity, and duration due to the ongoing effects of climate change. Rising global temperatures, combined with the urban heat island (UHI) effect, will lead to more frequent, longer-lasting, and higher-intensity heat waves, posing serious risks to public health, infrastructure, and economic stability.
With Cathedral City’s location in the Coachella Valley, extreme heat events are already common, but they are expected to worsen in the coming decades. Heat waves will be more frequent and prolonged, increasing the likelihood of health emergencies, power disruptions, and infrastructure degradation.
Projected Temperature Increases
Under current climate change scenarios, Cathedral City is expected to experience an increase in extreme heat days, with temperatures exceeding 113°F rising from 7 days per year today to 20 days per year by 2050.
The increase in extreme temperatures will intensify the risks associated with heat -related illnesses, economic productivity losses, and increased energy consumption for cooling. With an expected rise in cooling degree days, Cathedral City’s electricity usage for cooling purposes is projected to increase by
5.8% by 2050.
Increased Frequency of Heat Waves
Historically, heat waves in Cathedral City have been intense but relatively infrequent. Climate projections indicate that heat waves lasting three or more consecutive days will become significantly more common. The likelihood of experiencing at least one e xtreme heat wave per year will increase dramatically, leading to disruptions in daily life, elevated cooling costs, and a heightened burden on vulnerable populations, including low-income households, outdoor workers, and elderly residents.
Longer Duration and Warmer Nights
Not only will extreme heat waves become more frequent, but their duration will also increase, making multi-day heat waves the norm rather than the exception. The combination of rising daytime Local Hazard Mitigation Plan Update
50 temperatures and warmer nighttime temperatures will limit opportunities for heat recovery, increasing the risk of heat stress and heat-related illnesses.
Historically, Cathedral City has experienced hot summer nights where temperatures remain high, but by 2050, this number is expected to increase significantly, placing additional strain on the power grid and increasing the likelihood of rolling blackouts.
Warmer nights pose a significant health risk for vulnerable populations, as the lack of cooling can prevent the human body from recovering from daytime heat stress, increasing the risk of heat exhaustion, heat stroke, and cardiovascular complications. The increased demand for air conditioning during nighttime hours will also heighten energy demand, increasing the risk of power grid failures during peak heat waves.
3.3.2 Drought
Hazard Description
Drought is a prolonged period of below-average precipitation resulting in water shortages that impact people, agriculture, ecosystems, and industries. Unlike other natural hazards, droughts develop gradually and can persist for months or even years. Drough t severity is often exacerbated by high temperatures, low humidity, and increased evaporation rates, further straining natural and human systems.
According to the National Weather Service (NWS), drought is defined as a deficiency of moisture severe enough to adversely affect people, animals, or vegetation over a sizable area. The U.S. Drought Monitor classifies drought conditions on a scale from "Abnormally Dry (D0)" to "Exceptional Drought (D4)," based on multiple indicators such as precipitation deficits, soil moisture levels, and reservoir storage.
Droughts are categorized into five primary types based on their causes and impacts:
Local Hazard Mitigation Plan Update
51 • Meteorological Drought: Occurs when precipitation levels fall significantly below the historical average for an extended period. In California, shifts in climate patterns such as La Niña and El Niño influence drought conditions. The El Niño -Southern Oscillation (ENSO) cycle pla ys a crucial role in regional precipitation variability, with La Niña phases typically linked to drier conditions.
• Agricultural Drought : Results from insufficient soil moisture to sustain healthy crop and pasture growth. This is particularly concerning for California’s Central Valley, where agriculture relies heavily on surface water and groundwater supplies. Prolonged droughts lead to lower crop yields, increased irrigation demands, and higher food prices. • Hydrological Drought: Occurs when surface and groundwater supplies decline due to extended precipitation deficits, leading to reduced river flows, depleted reservoirs, and dropping groundwater tables. In Southern California, where water supplies depend on the Sierra Nevada snowpack, rising temperatures and altered precipitation patterns due to climate change have reduced snowpack accumulation, leading to earlier snowmelt and lower summer water availability.
• Socioeconomic Drought: Happens when water shortages disrupt economic activities, public infrastructure, and daily life. Drought conditions often result in stricter water use regulations, increased utility costs, and economic losses in sectors such as agriculture, energy produc tion, and tourism. Additionally, extended droughts elevate wildfire risk, increasing emergency response costs and insurance premiums.
• Ecological Drought : Disrupts natural ecosystems by affecting wildlife, aquatic habitats, and vegetation. Decreased streamflows and lower reservoir levels result in higher water
temperatures, declining fish populations, and habitat loss for native species. Prolonged droughts have also contributed to tree mortality and increased vulnerability to pests, such as bark beetle infestations.
Magnitude and Severity
Unlike sudden -onset hazards such as earthquakes or hurricanes, drought is a slow -developing phenomenon lacking a universally accepted severity scale. Instead, its magnitude and severity are evaluated using multiple indices that consider precipitation defic its, soil moisture levels, streamflow reductions, and socio-economic impacts.
Palmer Drought Severity Index (PDSI): The PDSI is a widely utilized metric that assesses long -term drought conditions by analyzing precipitation, temperature, and soil moisture data. It classifies drought severity on a scale from +4.0 (extremely wet) to -4.0 (extreme drought). This index is p articularly Local Hazard Mitigation Plan Update
52 pertinent to Southern California, where prolonged precipitation deficits and rising temperatures contribute to persistent drought conditions.
US Drought Monitor Classification Scheme.
Source: https://droughtmonitor.unl.edu/About/AbouttheData/DroughtClassification
U.S. Drought Monitor Classification: The U.S. Drought Monitor categorizes drought severity into five levels, serving as a critical tool for emergency declarations, water conservation measures, and agricultural impact assessments:
• D0 (Abnormally Dry): Short-term dryness, slower crop growth, and increased fire risk. • D1 (Moderate Drought): Some damage to crops, voluntary water restrictions implemented. • D2 (Severe Drought): Likely crop losses, water shortages, and mandatory restrictions. • D3 (Extreme Drought): Major crop losses, widespread water shortages, and heightened fire risk. • D4 (Exceptional Drought): Widespread water emergencies, ecosystem degradation, and significant economic losses.
Standardized Precipitation Index (SPI): The SPI measures drought intensity over various time scales, ranging from one month to multiple years. It quantifies deviations in precipitation from historical averages and is particularly useful for assessing short -term drought impacts on urban water su pplies.
Agencies such as the California Department of Water Resources (DWR) and the National Oceanic and Atmospheric Administration (NOAA) utilize SPI data to project seasonal drought risks for Southern California.
California Snow Water Equivalent (SWE) Index: A significant portion of Southern California’s water supply depends on the Sierra Nevada snowpack. The SWE Index measures the amount of water stored in the snowpack; lower SWE values indicate reduced runoff and heightened drought risk. Climate projections suggest that by 2050, SWE levels could decline by up to 65%, further exacerbating water shortages.
Local Hazard Mitigation Plan Update
53 Water Supply Vulnerabilities
Drought-prone areas within Cathedral City are not defined by physical geography but rather by their reliance on vulnerable water sources. The city’s primary water supply challenges stem from three key sources:
Groundwater Basins: Cathedral City depends on the Coachella Valley Groundwater Basin, a critical groundwater resource that provides water for municipal and industrial use.. The Indio Subbasin, which underlies Cathedral City and the majority of the Coachella Valley, contains 29.8 million acre-feet of groundwater in storage in the first 1,000 feet below the ground surface. The Indio Subbasin is replenished with imported Colorado River water which has averaged 124,592 acre -feet of recharged water since 2007. Historical low groundwater levels in the Indio Subbasin occurred in the years around 2009 but have since risen, recently achieving groundwater sustainability due to source substitution projects, conservation programs, and recharge operations.
Imported Water Supplies: Cathedral City relies on groundwater from the Indio Subbasin which is replenished by imported water from the Colorado River via the Colorado River Aqueduct. The Colorado River Basin has been in persistent drought since 2000, causing inconsistent snowpack and long-term water security concerns. State Water Project (SWP) water deliveries have averaged 45% of allocated supply since 2009 with allocations between 5% and 15% during extreme drought years, further stressing local water availability.
Surface Water Bodies: While Cathedral City lacks major natural lakes or reservoirs, it relies on regional storage facilities and groundwater replenishment programs managed by CVWD. These facilities experience heightened evaporation rates during prolonged drought periods, influ encing their effectiveness in maintaining stable water supplies.
Urban Development and Land Use Impacts on Drought Resilience Urban development and land use patterns in Cathedral City influence the city’s vulnerability and resilience to drought. Several key sectors are particularly impacted:
Residential Areas: Many residential neighborhoods in Cathedral City rely heavily on outdoor irrigation for landscaping, making them primary targets for mandatory water restrictions during drought emergencies. Landscaping water use accounts for a significant portion of household consumption, and drought conditions may lead to significant reductions in permitted irrigation.
Local Hazard Mitigation Plan Update
54 Commercial and Industrial Sectors: Cathedral City has a growing commercial and industrial sector, which depends on stable water supplies for cooling, processing, and other industrial applications. Water restrictions may lead to increased operational costs, production delays, and economic l osses, particularly for businesses that rely on high water usage.
Parks and Green Spaces: Public parks, golf courses, and urban green spaces face increased vulnerability to drought -induced water shortages. Vegetation stress and loss of tree cover may lead to higher temperatures and increased urban heat island effects, exacerbating extreme heat conditions.
Historical Occurrences of Drought
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
October 2021 Drought All 58 counties (including Riverside County) List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Drought is a recurrent hazard in California, with Cathedral City and the greater Coachella Valley experiencing multiple severe droughts in recent decades. These prolonged dry periods have strained water supplies, increased wildfire risk, and led to mandatory conservation measures. Historical drought occurrences highlight the increasing frequency and intensity of dry conditions, exacerbated by climate change and growing water demand.
Between 2000 and 2023, Cathedral City’s Whitewater River watershed experienced drought conditions for 80% of all weeks. Of these, 17% were classified as Extreme or Exceptional Drought (D3 -D4), signifying severe impacts on water supply, agriculture, and wildfire conditions. • 2011–2017 California Drought : The 2011 –2017 drought was one of the most severe and prolonged in California’s history. By 2014, nearly the entire state was classified under Severe Drought (D2) or worse, leading to significant reductions in groundwater levels and emergency water conservation mandates. In response, Governor Jerry Brown declared a statewide Local Hazard Mitigation Plan Update
55 emergency, requiring jurisdictions-including Cathedral City-to reduce water usage by at least 25%. Water restrictions remained in effect until early 2017, when consecutive winter storms replenished some of California’s reservoirs and aquifers • 2020–2022 Drought: Beginning in late 2020, another significant drought developed across California. By 2022, 97% of Riverside County, including Cathedral City, was classified under Extreme Drought (D3) or higher. Key impacts included:
• Reduced snowpack levels in the Sierra Nevada, a major source of water for California, leading to decreased runoff into reservoirs.
• Historic low water levels in the Colorado River Basin. • Increased wildfire risk, as prolonged drought dried vegetation earlier in the season, fueling more intense fires.
FEMA Disaster Declarations
While droughts do not typically result in FEMA Major Disaster Declarations (DR) in the same way as earthquakes or wildfires, their cascading impacts -such as wildfires, water shortages, and economic disruptions-have contributed to multiple FEMA disaster declarations in California. • FEMA DR -4323 (2017) provided federal assistance for wildfire damages exacerbated by prolonged drought conditions.
• FEMA DR-4558 (2020) was declared in response to wildfires intensified by ongoing drought, highlighting the link between prolonged dry periods and increased fire risk.
Federal and state drought emergency declarations have been issued multiple times, including Governor-declared drought emergencies in 2014, 2015, 2021, and 2022, all of which impacted Cathedral City.
Probability and Effects of Future Conditions
Overall probability over next five years: Likely.
Drought conditions in Cathedral City are anticipated to increase in frequency, duration, and severity due to climate change, rising temperatures, and shifting precipitation patterns. Climate
models and historical data indicate that the Coachella Valley will experience longer and more intense dry periods, punctuated by short, intense rainfall events. These changes are expected to lead to reduced water availability and inefficient groundwater re charge, compounding stress on the region’s already limited water resources.
Local Hazard Mitigation Plan Update
56 More Frequent and Prolonged Droughts: Projections suggest that Cathedral City and the surrounding Coachella Valley will experience increasing drought conditions nearly every decade, a significant shift from historical patterns where major droughts occurred approximately every 20 to 30 years.
Rising temperatures will exacerbate drought severity. By 2050, Cathedral City is projected to experience an increase in extreme heat days, with temperatures above 113°F rising from 7 days per year today to 32 days per year. These higher temperatures will a ccelerate evaporation rates, deplete soil moisture, and increase water loss from reservoirs, intensifying drought severity.
Declining Water Supplies and Increased Dependence on Imported Water : Cathedral City relies on groundwater from the Indio Subbasin, which is replenished with imported Colorado River water, and State Water Project (through an exchange agreement with Metropolitan Water District of Southern California),. Groundwater levels in the Indio Subbasin, which serves Cathedral City, reached historical low levels in 2009 but have since rebounded, recently achieving groundwater storage sustainability..
Groundwater production in the Indio Subbasin during water year 2024 was 267,495 acre-feet and has averaged 272,308 acre -feet since 2017. Source substitution projects and conservation programs have continued to support efforts to minimize supply needed from the Indio Subbasin.
The Colorado River Basin, a primary supply to replenish the Indio Subbasin, has been in persistent drought since 2000, with key reservoirs like Lake Mead and Lake Powell reaching historic lows. Federal negotiations on mandatory water cuts for the seven Colorado River basin states could reduce allocations to the Coachella Valley Water District (CVWD) who is an importer of Colorado River water.
Extreme Weather and Precipitation Variability ("Precipitation Whiplash") : Climate models indicate that Cathedral City and Southern California will experience more extreme shifts between drought and flooding, known as "precipitation whiplash." Prolonged dry conditions will be abruptly followed by intense rainfall, leading to rapi d runoff, erosion, and reduced groundwater replenishment. Despite occasional heavy precipitation events, the overall annual rainfall in Cathedral City is expected to remain at approximately 4.5 inches per year, meaning water shortages will persist . The frequency of extreme atmospheric river storms, which deliver the bulk of California’s precipitation, is expected to increase by 25% by 2070. However, these events will not be evenly distributed throughout the year, limiting their effectiveness in replenishing groundwater or restoring reservoir levels.
3.3.3 Fire
Description
Local Hazard Mitigation Plan Update
57 Urban fires occur in developed areas and are fueled by buildings, industrial operations, vehicles, and hazardous materials. Cathedral City faces elevated risks due to its mix of commercial, residential, and industrial areas, as well as major transportation corridors. While the city does not have a high concentration of large industrial facilities, it still has fuel storage sites, older structures, and commercial centers that increase fire risks.
Several key factors contribute to urban fire risk in Cathedral City. Commercial and industrial fires can originate from electrical failures, mechanical malfunctions, or hazardous materials accidents. Older commercial buildings and retail centers may lack modern fire-resistant materials, increasing the risk of rapid fire spread. The city also faces risks from electrical and transportation -related fires, as major roadways such as Interstate 10 and Highway 111 experience heavy truck traffic carrying hazardous cargo. Additionally, the city is traversed by multiple power transmission lines, increasing the risk of fire ignition during extreme heat or high wind conditions.
Wildfire and Wildfire Smoke: Although Cathedral City is not located in a Very High Fire Hazard Severity Zone (FHSZ), it is still vulnerable to wildfire risks from surrounding foothills and the nearby Santa Rosa and San Jacinto Mountains National Monument. Embers carried by Santa Ana winds can ignite dry vegetation in vacant lots, open spaces, and urban landscaping, increasing the risk of localized fire outbreaks. Wildfires in adjacent mountainous areas have the potential to cut off access to utilities, impact evacuation routes, and degrade air quality.
Air Quality Impacts: Wildfires across California, particularly in Riverside County and the nearby San Bernardino National Forest, generate smoke plumes that carry fine particulate matter (PM2.5), carbon monoxide, and other pollutants. Cathedral City experiences periodic "Unhealthy" air quality conditions (AQI 150 -200) due to wildfire smoke, disproportionately affecting vulnerable populations such as children, the elderly, and individuals with respiratory conditions.
Urban Vegetation and Fuel Sources: While Cathedral City does not have dense forests, dry grasses, palm trees, and landscaping vegetation create fire risks, particularly during extreme drought conditions.
Areas with vacant lots, parks, and right -of-way vegetation can act as fuel sources if not properly managed. Prolonged heat waves and extended droughts increase vegetation dryness, making urban fire hazards more severe.
Cathedral City’s moderate wildfire risk over the next 30 years is influenced by both natural and human- made factors. According to First Street Foundation’s Risk Factor data, approximately
6,092 properties, or 30% of all parcels, in Cathedral City have some level of wildfire exposure, primarily from embers or adjacent vegetation in the wildland-urban interface (WUI).
Local Hazard Mitigation Plan Update
58 Location and Geographic Extent
Cathedral City faces fire hazards shaped by land use patterns, commercial activities, transportation infrastructure, and regional wildfire exposure. While the city does not include extensive designated Very High Fire Hazard Severity Zones (VHFHSZs) under CAL FIRE’s 2025 Fire Hazard Severity Zone Maps, it remains vulnerable to urban fire risks, transportation-related fire hazards, and indirect wildfire impacts, including wind-driven ember transport, degraded air quality, and post-fire debris or mudflow events originating from neighboring jurisdictions.
Fire hazard areas in Cathedral City can be categorized into four general risk categories Commercial and Industrial Fire: Cathedral City’s mix of commercial, industrial, and mixed -use development areas increases exposure to structural and operational fire risks. Key hazards include:
• Aging electrical systems in older strip malls and shopping centers, • Fuel storage and mechanical operations in automotive, warehouse, and light manufacturing businesses,
• Proximity of commercial zones to residential neighborhoods, which can accelerate fire spread if initial containment fails.
Residential Fire: While Cathedral City is not formally classified in CAL FIRE’s 2025 VHFHSZ for LRAs, structural fire risks remain-especially in:
• Older neighborhoods with wood -frame homes, limited fire suppression systems, or poor defensible space,
• Multi-family and mobile home parks, where structure spacing and egress limitations increase vulnerability,
• Residences near dry washes or desert vegetation prone to wind-driven ignition from embers.
Wildfire Risk and Ember Transport: Although Cathedral City lacks a history of large -scale wildfire within its municipal limits, it is indirectly at risk due to its proximity to wildfire -prone areas such as the Santa Rosa and San Jacinto Mountains National Monument. During Santa Ana wind events, embers can travel several miles and ignite:
• Rooftop materials,
• Yard vegetation,
• Dry landscaping in parks and medians.
Local Hazard Mitigation Plan Update
59 Cathedral City also faces secondary risks from mud and debris flows following regional wildfires or heavy storms, particularly when transported via flood control channels from upstream burn scars -an increasingly relevant hazard under future climate conditions.
Transportation and Utility Fire Risk Corridors: High-use transportation corridors and utility alignments present persistent fire hazards:
• Interstate 10 and Highway 111 carry substantial commercial freight and hazardous materials, increasing risk of vehicular or cargo fires,
• Union Pacific rail lines, which traverse the Coachella Valley just north of Cathedral City, carry combustible materials that, if derailed, could pose ignition threats, • Southern California Edison (SCE) transmission infrastructure -particularly overhead high - voltage lines near Flat Top Mountain and Edom Hill-may spark fires during wind or heat stress, especially in dry vegetation zones.
Local Hazard Mitigation Plan Update
60 Relationship to Land Use and Development in Cathedral City The distribution of fire hazards in Cathedral City is closely linked to land use patterns, commercial and residential density, and transportation infrastructure. While Cathedral City does not have a high concentration of heavy industrial activity, the city ’s mix of commercial centers, industrial storage, transportation corridors, and high-density residential areas creates distinct fire risk zones.
Cathedral City’s zoning and land use plan designates significant portions of the city for commercial and mixed-use development, which increases vulnerability to structural fires, electrical equipment failures, and fuel -related ignition sources. The presenc e of auto repair shops, warehouses, gas stations, and commercial centers contributes to fire risk, especially in older buildings that may lack modern fire - resistant materials and suppression systems.
Higher-density developments, including multi-family residential areas, mobile home parks, and mixed- use districts, increase structure -to-structure fire spread risk. Many residential and commercial buildings in Cathedral City were built before modern fire c odes and may not have adequate fire suppression systems, making them more vulnerable to fire hazards.
Additionally, aging electrical infrastructure and the presence of overhead power lines present fire ignition risks. High winds, extreme heat, and electrical faults have historically contributed to fire outbreaks in Southern California communities and remain an ongoing concern for Cathedral City Magnitude and Severity of Fire Hazards
Fire Intensity and Structural Impact – Fire Intensity Scale (FIS): The Fire Intensity Scale (FIS) classifies fire severity based on energy release, flame length, and suppression difficulty. Cathedral City’s fire hazards are most commonly associated with structural fires and transportation-related incidents, with the potential for larger, more intense fire events under extreme conditions. • Class 1 (0-250 kW/m): Small, localized fires in structures or open areas that can be extinguished with standard firefighting methods. This category includes residential fires and minor vehicle fires.
• Class 2 (251-1,000 kW/m): Moderate-intensity fires, including commercial building fires and industrial storage yard fires, requiring coordinated suppression efforts. • Class 3 (1,001 -10,000 kW/m): Large warehouse or commercial center fires and wind -driven urban fires that require multi-agency response and pose risks to nearby structures.
Local Hazard Mitigation Plan Update
61 • Class 4 (10,001 -50,000 kW/m): Fires involving hazardous materials and fuel storage sites, generating toxic smoke and extreme heat, requiring specialized response. • Class 5 (50,001+ kW/m): Large -scale conflagrations, including multi -structure urban fires, industrial explosions, or catastrophic transportation -related fires, necessitating mass evacuations.
Wildfire Spread and Impact – National Fire Danger Rating System (NFDRS): Although Cathedral City is not located in a Very High Fire Hazard Severity Zone (VHFHSZ), wildfire risks are still present due to ember transport, prolonged drought conditions, and regional fire activity. The National Fire Danger Rating System (NFDRS) categorizes wildfire risk based on weather conditions, fuel moisture, and fire spread potential.
• Low: Fires spread slowly and are easily controlled, with minimal risk of regional impact. • Moderate: Fires ignite in dry grass and urban vegetation, but spread is limited unless driven by high winds.
• High: Fires spread rapidly in dry conditions and can be intensified by ember transport.
Wildfires from surrounding areas can contribute to structural ignitions in Cathedral City. • Very High: Fast-moving fires, especially during Santa Ana wind events, can ignite structures, vehicles, and industrial storage areas, requiring rapid emergency response. • Extreme: Fires exhibit explosive growth, necessitating multi -agency firefighting efforts and evacuations. Embers can travel long distances and create widespread fire hazards.
Ember Transport Risk – Spot Fire Probability Model: Cathedral City’s vulnerability to ember transport is heightened due to proximity to fire -prone areas, high winds, and flammable materials stored in commercial and industrial zones. The Spot Fire Probability Model assesses ember ignition risks based on wind speeds and fuel sources:
• 40-60 mph winds: Embers can travel 1-3 miles, igniting vegetation, rooftops, and storage areas containing flammable materials.
• 80+ mph winds: Embers can travel over 5 miles, significantly increasing the risk of spot fires within urban and commercial areas.
Air Quality Impact – Wildfire Smoke and the Air Quality Index (AQI): Wildfire smoke from regional fires has historically impacted Cathedral City, leading to elevated PM2.5 (fine particulate matter) pollution levels. The Air Quality Index (AQI) system measures wildfire-related pollution and associated health risks:
• AQI 100-150: Unhealthy for sensitive groups, requiring air quality advisories.
Local Hazard Mitigation Plan Update
62 • AQI 151 -200: Unhealthy for the general population, prompting recommendations to limit outdoor activities.
• AQI 201 -300: Very unhealthy, requiring emergency health advisories and restrictions on outdoor exposure.
• AQI 300+: Hazardous, triggering public health warnings, school closures, and emergency response actions.
Fire Hazard Severity
Urban fire severity in Cathedral City is considered moderate to high, driven by a combination of aging structures, vulnerabilities in electrical infrastructure, and concentrated commercial fire loads.
Although the city does not contain large -scale industri al refineries, specific land uses -such as automotive repair facilities, localized fuel storage sites, and older commercial centers-present structural and operational fire hazards. High -density residential areas, particularly those with wood -frame construction and outdated or absent fire suppression systems, increase the likelihood of structure -to- structure fire spread during ignition events. In many neighborhoods, close proximity between residential and commercial zones contributes to compounded fire risk.
Transportation infrastructure also plays a role in urban fire severity. Interstate 10 and Highway 111, both of which traverse the city, carry high volumes of freight, including hazardous or flammable materials. This increases the potential for vehicular fi res, hazardous material releases, or roadside ignitions. These corridors, combined with above -ground electrical infrastructure, create additional ignition pathways, particularly during periods of high temperature and wind.
Wildfire and ember transport risk in Cathedral City is considered moderate. While the city itself is not classified within a Very High Fire Hazard Severity Zone (VHFHSZ) according to CAL FIRE’s 2025 maps, it remains vulnerable to indirect wildfire impacts due to proximity to high-risk wildland areas, including the Santa Rosa and San Jacinto Mountains. Wind -driven wildfire events in these regions - especially during Santa Ana conditions -can transport embers into the city. These embers can ignite vulnerable rooftops, dry vegetation, and combustible materials in industrial or commercial yards.
Approximately 6,092 properties in Cathedral City, or roughly 30 percent of all parcels, are considered to have some level of wildfire exposure over the next 30 years. This estimate is based on First Street Foundation’s 2024 parcel -level wildfire modeling, which incorporates local building characteristics, surrounding land cover, prevailing wind patterns, and ember susceptibility. Properties with higher exposure are typically located in areas with limited defensible space, older construction, or proximity to ornamental vegetation and dry landscaping.
Local Hazard Mitigation Plan Update
63 The probability of spot fires igniting within the urban core increases significantly during prolonged droughts, particularly when vegetation and surface debris become highly flammable. During extreme fire weather events, such as those driven by Santa Ana winds, the combination of low humidity, high temperatures, and combustible conditions elevates the risk of ember ignitions in older neighborhoods, commercial zones with high fuel loads, and industrial sites. While Cathedral City may not face large - scale wildfire spread internally, the cumulative risks posed by urban fire dynamics, regional ember exposure, and climate-driven fuel volatility represent a significant hazard to life safety, property, and air quality.
Historical Occurrences of Fire
FEMA Disaster Declarations
Incident
Subcategory County
FEMA
Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date Declaration Title State
Fire Riverside
County DR-1005-CA 1993 October 10/28/1993 FIRES, MUD/LANDSLIDES,
FLOODING, SOIL EROSION CA
Fire Riverside
County DR-1498-CA 2004 October 10/24/2004 WILDFIRES CA
Fire Riverside
County DR-1731-CA 2007 November 11/3/2007 WILDFIRES CA
Fire Riverside
County DR-1810-CA 2008 July 7/9/2008 WILDFIRES CA
Fire Riverside
County DR-1884-CA 2010 August 8/31/2010 WILDFIRES CA
Fire Riverside
County DR-4158-CA 2013 July 7/26/2013 WILDFIRES CA
Fire Riverside
County DR-4305-CA 2017 October 10/10/2017 CALIFORNIA WILDFIRES CA Fire Riverside
County DR-4407-CA 2018 August 8/4/2018 CALIFORNIA WILDFIRES CA Fire Riverside
County DR-4558-CA 2020 August 8/22/2020 CALIFORNIA WILDFIRES CA Fire Riverside
County DR-4610-CA 2021 September 9/12/2021 CALIFORNIA WILDFIRES CA Fire or wildfire-related declared disasters in the vicinity of the Coachella Valley, 1953-2024. Source: FEMA California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
September 9, 2024 Fire (Airport) Orange, Riverside
Local Hazard Mitigation Plan Update
64 DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
October 10, 2019 Wildfires (Eagle, Sandalwood,
Reche, and Wolf fires)
Riverside
August 2018 Wildfire (Holy Fire) Orange and Riverside
July 2018 Wildfires (Cranston & Carr Fire) Riverside and Shasta August 7, 2013 Wildfire (Silver Fire) Riverside
July 15, 2013 Wildfire (Mountain Fire) Riverside
November 2008 Wildfires Los Angeles, Orange, Riverside, San Bernardino, Santa Barbara
October 21, 2007 Wildfires Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara,
Ventura
October 2006 Wildfire Riverside
October – November 2003 Wildfires Los Angeles, Riverside, San Bernardino, San Diego, Ventura
October 27 & 28, 1993 Firestorms Los Angeles, Orange, Riverside, San Bernardino, San Diego, Ventura
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Cathedral City’s fire history has been shaped by urban structure fires, transportation -related fire hazards, and indirect wildfire exposure. Although the city is not classified within a Very High Fire Hazard Severity Zone (VHFHSZ), its proximity to the Santa Rosa and San Jacinto Mountains, extensive commercial activity, and major transportation corridors contribute to significant fire risks Between 1984 and 2021, no major wildfire incidents have been officially recorded within Cathedral City’s boundaries. However, the city has periodically been affected by wildfire smoke, ember transport, and emergency response efforts linked to regional wildfires. • 2020 Wildfire Smoke and Air Quality Emergency: During the September 2020 wildfire season, Cathedral City experienced hazardous air quality conditions due to smoke from wildfires across Southern California. The AQI (Air Quality Index) exceeded 200 ("Very Unhealthy"), prompting public health advisories, school closures, and emergency responses. Wildfire smoke transported from fires in San Bernardino National Forest, the San Jacinto Mountains, and other regions led to an increase in emergency room visits for respiratory distress. • Power Line Fire near Interstate 10 (2021): In July 2021, a utility -related fire occurred near Interstate 10, igniting dry brush along the freeway embankment. High temperatures and dry conditions contributed to the rapid spread of the fire, which temporarily disrupted traffic and required emergency fire suppression efforts. This incident underscored the ongoing risk of electrical infrastructure failures as ignition sources, particularly during the peak summer fire season.
Local Hazard Mitigation Plan Update
65 While Cathedral City has not experienced major wildfires within city limits, it is periodically affected by wind-driven embers from fires in surrounding mountainous areas. Santa Ana wind events have the potential to carry embers from fires burning in Riverside County, the San Bernardino National Forest, and the Santa Rosa Mountains into Cathedral City, where they could ignite dry vegetation, rooftops, and flammable storage areas.
Nearby FEMA Disaster Declarations Related to Fire Hazards While Cathedral City has not been the direct recipient of a FEMA fire -related disaster declaration, several regional disaster declarations have impacted the city due to wildfire smoke, ember transport, and emergency response coordination.
• FEMA DR-4569-CA (October 2020 – Regional Wildfires, including Bobcat Fire and El Dorado Fire): This federal disaster declaration covered major wildfires in Southern California, including the Bobcat Fire in Los Angeles County and the El Dorado Fire in San Bernardino County. Cathedral City was not directly in the burn zone but experienced severe smo ke pollution and degraded air quality, prompting health advisories and emergency response measures
• FEMA DR -5285-CA (September 2022 – Statewide Wildfires and Smoke Impacts) : This declaration covered multiple large-scale wildfires across California, including the Fairview Fire and Mosquito Fire. During this period, wildfire smoke caused AQI levels in Cathedral City to deteriorate to "Unhealthy" (AQI 150-200) for multiple days, leading to increased health risks, disruptions to outdoor activities, and increased hospital visits for respiratory illnesses. Although Cathedral City did not receive direct federal assistance, regional disaster funding supported firefighting operations and emergency air quality monitoring in Riverside County.
Probability and Effects of Future Fire Conditions
Overall probability over next five years: Likely.
Urban fire risk in Cathedral City is influenced by commercial density, electrical infrastructure vulnerabilities, and transportation -related fire hazards. The probability of significant fire events remains moderate to high due to aging electrical systems, commercial storage of flammable materials, and increased energy demand. In particular, commercial and mixed -use zones with older buildings lacking modern fire suppression systems present a higher risk of structural fire spread.
Local Hazard Mitigation Plan Update
66 While Cathedral City is not located within a Very High Fire Hazard Severity Zone (VHFHSZ), over 6,092 properties-approximately 30% of all properties in the city -have some level of wildfire risk over the next 30 years. These risks stem from heat -induced ign itions, ember transport, and prolonged drought conditions that create more flammable landscapes.
Urban fire risk in Cathedral City is expected to increase in severity, particularly in high -risk commercial areas where hazardous materials and aging electrical infrastructure increase fire ignition potential. Power grid failures, mechanical malfunctions, and electrical faults are projected to become more frequent as extreme heat events increase energy demand.
Fire intensity is expected to rise, with large-scale commercial fires, classified as Class 3 or higher on the Fire Intensity Scale (FIS), becoming more severe in cases involving flammable chemicals, plastics, or fuel storage. Without proactive mitigation measures, urban fires could result in higher property losses and greater demands on emergency response resources.
Wildfire risk in Cathedral City is expected to grow due to rising temperatures, prolonged drought, and stronger wind events. The number of extreme wildfire days-defined by temperatures exceeding 100°F, humidity below 15%, and winds greater than 40 mph-is projected to increase by 30-50% by 2050.
Santa Ana wind conditions are expected to persist for longer periods each season, increasing by approximately 10-15%, which will further elevate the risk of wind -driven fire spread affecting urban areas. Reduced regional fuel moisture levels due to persistent droughts will contribute to larger, more intense wildfires, indirectly impacting Cathedral City through wildfire smoke, air quality deterioration, and transportation disruptions.
While Cathedral City does not face direct wildfire exposure, it is vulnerable to wind -driven ember transport from regional wildfires in the Santa Rosa and San Jacinto Mountains. Santa Ana winds reaching speeds of 40-80 mph could carry embers into urban are as, igniting dry vegetation, rooftops, and industrial storage materials.
Wildfire smoke remains a persistent hazard, with air quality frequently deteriorating during major fire events. AQI levels exceeding 150 ("Unhealthy") have been recorded multiple times in Cathedral City due to wildfire smoke transport from surrounding regi ons. Projections suggest that AQI levels exceeding 200 ("Very Unhealthy") may occur annually by 2050, necessitating expanded public health protections, enhanced air filtration measures, and emergency response planning for prolonged smoke exposure.
Local Hazard Mitigation Plan Update
67 3.3.4 Power Outage
Description
A power outage, also known as an electrical blackout or power failure, is the loss of electrical service to a given area due to disruptions in the generation, transmission, or distribution of electricity. Outages may be localized, affecting a small area or facility, or widespread, impacting entire regions for extended periods. The severity of an outage depends on its duration, geographic extent, and the ability of electrical utilities to restore power. Cathedral City’s reliance on commercial activities, eme rgency services, and extreme heat mitigation measures makes power reliability a key concern.
Power outages in Cathedral City can occur in three primary forms, each with distinct implications:
• Momentary interruptions, lasting seconds to minutes, typically occur due to automatic grid protection systems responding to minor faults, such as tree branches contacting power lines or short circuits. These brief outages can disrupt traffic signals, industrial equipment, and business operations.
• Sustained outages, lasting minutes to hours, often result from localized equipment failures, transformer malfunctions, or downed power lines. Such outages cause disruptions to traffic flow, emergency response systems, and residential air conditioning units , particularly during extreme heat.
• Extended blackouts, lasting multiple hours to days or even weeks, are often caused by major disasters such as earthquakes, extreme wind events, or regional grid failures. Prolonged outages Local Hazard Mitigation Plan Update
68 have severe implications for hospitals, water treatment plants, communication networks, and cooling infrastructure.
Cathedral City’s electrical infrastructure is vulnerable to multiple outage triggers, including weather - related events, infrastructure failures, and human-caused disruptions. • Extreme Heat and Grid Overload: Cathedral City experiences high temperatures exceeding 120°F during summer months, increasing electricity demand for air conditioning and industrial cooling systems. Overloaded infrastructure can lead to rolling blackouts or brownouts, particularly between July and September. As the number of days exceeding 111°F is expected to increase from 7 days in 1990 to over 32 days per year by 2050, power grid strain will become more severe.
• Santa Ana Winds and Storm Events: Wind gusts exceeding 50 mph can topple power lines, damage transformers, and cause airborne debris to strike electrical equipment, increasing the risk of outages. Santa Ana winds also heighten wildfire risks, and Southern California Edison (SCE) may preem ptively shut off power through Public Safety Power Shutoffs (PSPS) to prevent utility-related ignitions.
• Earthquakes and Seismic Damage: A major earthquake could disrupt power supply by damaging substations, transmission lines, and underground electrical conduits. A large -scale seismic event could cause cascading failures, impacting critical emergency response capabilities, water treatment operations, and cooling centers.
• Vehicle Collisions and Equipment Failures: Given Cathedral City’s proximity to major transportation corridors such as Interstate 10 and Highway 111, the risk of vehicular collisions damaging power poles or substations is elevated. Additionally, aging electrical infrastructure presents reliability concerns, particularly during periods of peak demand or extreme weather. • Cyberattacks and Physical Security Threats: As part of Southern California’s regional power grid, Cathedral City relies on digitally connected electrical systems that could be targeted by cyberattacks. Intentional disruptions to substations or grid control centers could cause widespread outages.
Utility-initiated Public Safety Power Shutoffs (PSPS) add another layer of complexity to Cathedral City’s power reliability. Southern California Edison (SCE) may preemptively shut off power to reduce wildfire ignition risks during high wind and dry conditi ons. While Cathedral City is not within a designated high wildfire risk zone, PSPS events in adjacent areas may still affect power supply, disrupting businesses, schools, and vulnerable residents.
Location and Geographic Extent
Local Hazard Mitigation Plan Update
69 Power outages in Cathedral City can occur citywide but have a higher probability and greater consequences in specific locations due to infrastructure vulnerabilities, land use patterns, and population density.
Cathedral City has a significant concentration of commercial and light industrial facilities, particularly along East Palm Canyon Drive, Date Palm Drive, and Highway 111. These areas rely heavily on uninterrupted power for refrigeration, automated processing, and retail operations. Extended blackouts can disrupt business continuity, result in financial losses, and impact emergency services.
Residential neighborhoods, particularly mobile home parks, senior housing complexes, and high - density apartments, face elevated risks during power outages, especially during extreme heat events.
Many low-income households lack backup power sources, making them vulnerable to heat -related illnesses. Air conditioning failures during power outages in summer months pose significant public health risks, particularly in areas where temperatures can exceed 120°F.
Key transportation corridors such as Interstate 10, Date Palm Drive, and Ramon Road depend on functional traffic signals and street lighting, which can become non-operational during power failures.
Public safety services, including fire stations, police de partments, and hospitals, rely on backup generators, but prolonged outages could strain these emergency resources.
Relationship to Land Use and Development
As new development occurs and energy demand rises, mitigating power outage risks will require proactive planning and grid modernization. Cathedral City’s growing commercial and residential sectors are increasing electricity demand, placing additional strain on existing electrical infrastructure.
The expanding logistics, retail, and hospitality sectors require consistent, high-capacity power sources.
Without grid upgrades and backup power systems, outages could lead to business disruptions, production losses, and economic instability.
Magnitude and Severity
Unlike natural hazards that have well -defined measurement scales (e.g., the Modified Mercalli Intensity Scale for earthquakes or the Saffir -Simpson Scale for hurricanes), power outages are categorized based on their geographic scope, duration, and cascading effects. While momentary service interruptions are common, prolonged and widespread outages can have severe consequences for public health, emergency response, industrial operations, and economic stability.
Outage Scope and Geographic Extent – U.S. Department of Energy (DOE) Classification Local Hazard Mitigation Plan Update
70 The U.S. Department of Energy (DOE) classifies power outages based on the number of customers affected and the extent of grid failure:
• Localized Outage (Level 1): Affects a single building, block, or small neighborhood due to equipment failure, minor weather impacts, or scheduled maintenance. Typically lasts under two hours and has minimal community-wide impacts.
• Substation-Level Outage (Level 2): Impacts hundreds to thousands of customers due to transformer failures, high wind damage to power lines, or extreme heat grid stress. Outages last a few hours to a full day, affecting traffic signals, businesses, and emergency services. • Citywide or Regional Outage (Level 3): Affects tens of thousands of customers due to major transmission failures, wildfire -related public safety power shutoffs (PSPS), or severe storms.
Lasts several hours to multiple days, causing significant economic and emergency response impacts.
• Grid Failure or Blackout (Level 4): A widespread, prolonged outage affecting multiple cities, counties, or states, often caused by major weather disasters, earthquakes, or
cyberattacks. Can last weeks, leading to severe economic losses, public health emergencies, and security concerns.
Cathedral City most frequently experiences Level 1 and Level 2 outages, though Level 3 outages have occurred during extreme weather events and regional grid failures.
Outage Duration and Restoration Complexity – IEEE 1366 Reliability Indices The Institute of Electrical and Electronics Engineers (IEEE) Standard 1366 provides reliability indices to measure the frequency and duration of power outages. These indices help utilities and emergency planners assess service reliability and outage severity:
• System Average Interruption Duration Index (SAIDI): Measures total annual power outage duration per customer. In Cathedral City, SAIDI has historically ranged from 60 to 120 minutes per year, though this increases significantly during heat waves and high-wind events. • System Average Interruption Frequency Index (SAIFI): Measures how often the average customer experiences an outage per year. In Cathedral City, SAIFI values suggest 1 -2 outages per year under normal conditions, with higher frequencies during peak summer months. • Customer Average Interruption Duration Index (CAIDI): Evaluates the average time to restore power after an outage. CAIDI in Cathedral City is typically under 90 minutes but can increase significantly during extreme weather or seismic events.
Local Hazard Mitigation Plan Update
71 Severity of Power Outages
The severity of a power outage depends on its duration, the number of customers impacted, and cascading effects on critical infrastructure. Outages range from minor disruptions to large -scale emergencies.
• Short-Term Outages (Less than 2 hours – Low Severity): Short-term outages are the most common in Cathedral City and are typically caused by localized transformer failures, minor equipment malfunctions, or temporary weather-related disruptions. While these outages cause minimal long-term impacts, they can disrupt traffic signals, interfere with business operations, and create safety concerns for residents reliant on medical equipment. • Medium-Term Outages (2 to 12 hours – Moderate Severity): Outages lasting several hours are often due to heat -related grid overloads, vehicle collisions with power infrastructure, or downed power lines from wind events. These outages increase risks such as:
o Traffic congestion and increased accident risk due to non-functioning traffic lights.
o Business closures and financial losses, especially for restaurants, grocery stores, and industrial facilities relying on continuous power.
o Medical risks for individuals dependent on electricity -powered medical devices, particularly in high-temperature conditions.
• Long-Term Outages (12 hours to multiple days – High Severity): Extended outages, typically caused by severe storms, wildfires, or regional grid failures, result in widespread impacts such as:
o Loss of refrigeration for food and medication, increasing health risks for vulnerable populations.
o Emergency service delays, including 911 call center disruptions and decreased police/fire response efficiency.
o Shutdowns of water and wastewater treatment facilities if backup generators fail, leading to public health risks . Should this section include impacts if outages occur during summer months – added threat of heat exposure, deaths? o Catastrophic Power Outages (Multiple Days to Weeks – Extreme Severity): A catastrophic, prolonged power outage -such as one caused by a major earthquake, cyberattack, or statewide grid failure -could create a widespread humanitarian and economic crisis. In such cases:
o Hospitals and emergency services would rely solely on backup generators, which could fail if fuel supplies run out.
o Mass evacuations may be necessary if essential services such as water, fuel, and communication systems become inoperable.
Local Hazard Mitigation Plan Update
72 o The financial impact on businesses, particularly in the industrial sector, could result in millions of dollars in losses due to production stoppages, supply chain failures, and perishable inventory losses.
Historical Occurrences of Power Outages
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization
Cathedral City has experienced multiple power outages over the past two decades due to extreme heat, high winds, equipment failures, and regional grid instability. Power outages have occurred during heatwaves, storms, and Public Safety Power Shutoffs (PSPS) implemented to reduce wildfire risk. • July 2006 California Heatwave Power Outages: In July 2006, California experienced one of its most severe heatwaves, resulting in record -breaking temperatures that overwhelmed the power grid. Cathedral City, like other parts of Riverside County, faced rolling blackouts lasting between two to six hours. The outages affected residences, businesses, and industrial zones, particularly straining air conditioning systems, transformers, and substations. • December 2011 Santa Ana Windstorm and Power Failures : A Santa Ana wind event in December 2011 brought gusts exceeding 80 mph, toppling power lines, damaging transmission infrastructure, and causing widespread outages. The event left thousands of residents and businesses in Cathedral City and surrounding areas without electricity for several days. The power failure also resulted in traffic signal failures, incr eased accident risks, and business disruptions.
• September 2015 Heatwave and Grid Overloads : In September 2015, a late -summer heatwave caused local power failures across Riverside County, including Cathedral City. With temperatures exceeding 105°F, transformers in residential and commercial districts failed, Local Hazard Mitigation Plan Update
73 causing outages that lasted between four to eight hours. Businesses and residents reliant on air conditioning and refrigeration systems were significantly impacted. • July 2018 Southern California Power Grid Strain : A statewide heatwave in July 2018 caused emergency grid conditions, forcing rolling blackouts in Cathedral City and other parts of Riverside County. Outages lasted between one to three hours, affecting residential areas, commercial corridors, and industrial facilities. Large industrial users were required to reduce energy consumption, leading to temporary production slowdowns. • January 2023 California Winter Storm and Power Outages : In early 2023, a series of atmospheric river storms brought high winds, heavy rain, and flooding to Southern California, including Cathedral City. Wind speeds exceeding 50 mph damaged power lines and transformers, leading to outages that lasted up to 48 hours in some industrial districts.
FEMA Disaster Declarations Related to Power Outages
While power outages alone do not typically trigger standalone FEMA disaster declarations, they often occur as secondary impacts of federally declared disasters such as extreme heat, wildfires, and high - wind events. Cathedral City has been affected by sever al FEMA disaster declarations linked to major power failures.
• FEMA DR -4301-CA (February 2017 – Winter Storms and Infrastructure Damage) : Severe winter storms caused flooding, high winds, and power outages across Southern California, including Cathedral City. Localized outages resulted from downed power lines and water - damaged electrical equipment. FEMA assistance was provided for public infrastructure repairs, including electrical system restoration.
• FEMA DR -4569-CA (October 2020 – Wildfires and PSPS Events) : During California’s devastating 2020 wildfire season, utility companies implemented Public Safety Power Shutoffs (PSPS) to mitigate fire risks. While Cathedral City was not directly impacted by wildfires, PSPS events disrupted portions of the regional electrical grid, leading to brief power interruptions in industrial zones.
• FEMA DR-4683-CA (January 2023 – Winter Storm Power Failures) : A series of atmospheric river storms caused flooding, landslides, and power failures across Southern California.
Cathedral City experienced extended power outages in some industrial districts as a result of high winds damaging electrical infrastructure.
Probability and Effects of Future Conditions
Overall probability over next five years: Likely.
Local Hazard Mitigation Plan Update
74 Cathedral City is projected to experience an increase in both the frequency and severity of power outages due to rising energy demand, climate change impacts, and vulnerabilities in aging electrical infrastructure. While short-term, localized outages will continue to result from equipment failures and minor weather disturbances, the likelihood of prolonged and widespread blackouts is growing. Extreme heat events, high windstorms, seismic activity, and cyber or physical attacks on power infrastructure all contribute to this increasing risk.
Risk assessments for power outages rely on historical outage data, climate projections, and grid reliability modeling. As part of Southern California Edison’s (SCE) service territory and the California Independent System Operator (CAISO) power grid, Cathed ral City is subject to forecasts by CAISO, the U.S. Department of Energy (DOE), and the North American Electric Reliability Corporation (NERC), which track grid stability, energy demand trends, and outage risks.
Cathedral City is located in a seismically active region, making its electrical infrastructure highly susceptible to earthquake-related damage. A magnitude 6.5 or greater earthquake on the San Andreas or San Jacinto faults could result in severe disruption s to substations, high-voltage transmission lines, and underground power conduits. Restoration efforts following a major earthquake could extend for several days or weeks, depending on the extent of damage to infrastructure and available repair resources.
Climate models predict that rising temperatures, prolonged heatwaves, and more intense storms will significantly impact electrical grid stability. By 2050, the number of extreme heat days exceeding 95°F in Cathedral City is projected to double, leading to an estimated 30% increase in heat -related grid overloads. The frequency of rolling blackouts is expected to rise as electricity demand peaks during extreme weather events. Additionally, Santa Ana wind events, a leading cause of power line damage, are anticipated to become more intense due to climate change, increasing the probability of wind - driven outages. High wind events can topple power lines, damage transformers, and disrupt transmission infrastructure, especially in areas with overhead electrical lines.
By 2045, CAISO projects that peak electricity demand in Southern California will increase by 25–30%, raising the likelihood of power shortages during heatwaves. If renewable energy generation and grid modernization efforts fail to keep pace, rolling blacko uts could become an annual occurrence during extreme heat periods. Businesses and industrial facilities may face significant economic impacts, with extended power outages potentially resulting in annual losses ranging from $5 million to $10 million due to production delays, business closures, and supply chain disruptions.
Local Hazard Mitigation Plan Update
75 PSPS events, which preemptively cut power to reduce wildfire risks, are expected to increase in both duration and geographic coverage by 2030. While Cathedral City may not face direct wildfire threats, regional power disruptions could have widespread econo mic consequences, affecting businesses, schools, hospitals, and emergency response systems.
Cybersecurity threats to electrical infrastructure are projected to rise significantly in the coming decades. National security assessments estimate that by 2040, the probability of a major cyberattack affecting the power grid will increase by 50%. Additionally, physical attacks on substations, similar to those previously carried out in California, could lead to localized or widespread power failures.
3.3.5 Earthquake
Description
An earthquake is a sudden and violent shaking of the ground caused by the release of energy within the Earth's crust due to movement along fault lines. This energy release generates seismic waves that propagate outward, resulting in ground shaking, surface rupture, soil liquefaction, landslides, and, in some cases, tsunamis. Earthquakes vary in magnitude, depth, and duration, with impacts ranging from minor tremors to catastrophic destruction. Their severity depends on factors such as the amount of energy r eleased, proximity to the epicenter, depth of the seismic activity, and local geological conditions. Because seismic events occur without warning, they are among the most unpredictable and destructive natural hazards.
Cathedral City is located within a highly seismically active region of Southern California, primarily influenced by the southern segment of the San Andreas Fault Zone, which is capable of generating magnitude 8.0+ earthquakes. The San Jacinto Fault Zone, l ocated west of the city, also presents a Local Hazard Mitigation Plan Update
76 significant seismic hazard and has historically been the source of multiple moderate -to-large earthquakes. Additional faults that may impact Cathedral City include the Pinto Mountain Fault, the Burnt Mountain Fault, and the Elsinore Fault, all of which ar e capable of producing strong ground shaking.
The Banning Fault, a branch of the San Andreas system, runs across the northern portion of the planning area and is capable of producing a magnitude 7.4 earthquake, which could generate peak ground accelerations of 0.45 to 0.9g in Cathedral City. The Mission Creek Fault, another strand of the San Andreas Fault, could generate peak accelerations of 0.4 to 0.8g, with the potential for even greater accelerations if simultaneous rupture of multiple fault strands occurs.
The majority of earthquakes affecting Cathedral City result from tectonic activity along strike -slip faults, where plates move laterally against one another. The San Andreas Fault and its subsidiary faults define the boundary between the Pacific Plate and the North American Plate, making the region particularly prone to strong seismic events.
Human activities such as groundwater extraction, oil and gas production, and geothermal energy development can also trigger seismic activity. In areas of the Coachella Valley, subsurface fluid withdrawal has been linked to minor induced seismicity, though it is not the primary source of earthquake risk.
Secondary Effects of Earthquakes
Ground Shaking: Cathedral City is subject to severe ground shaking during large earthquakes. The valley floor consists of loose, recently deposited sediments, which amplify seismic waves, increasing the likelihood of structural damage.
Surface Rupture: If an earthquake occurs along a shallow fault, ground displacement may damage roads, pipelines, and buildings. The Banning Fault and Mission Creek Fault, which pass through Cathedral City’s planning area, have the potential for surface rupture during a significant seismic event.
Liquefaction: Liquefaction occurs when loose, saturated soils temporarily lose strength and behave like a liquid due to strong shaking. While the potential for liquefaction is low to none throughout most of Cathedral City, certain areas near the northern portion of the planning area, particularly near the San Andreas Fault, have a moderate to high susceptibility due to shallow groundwater levels.
Local Hazard Mitigation Plan Update
77 Seismically Induced Settlement: The valley floor consists of unconsolidated sediments that are highly susceptible to settlement, which can damage buildings, pipelines, and grade -sensitive infrastructure.
Developers in high -risk areas should conduct subsurface geotechnical investigations to evaluate settlement risks and implement mitigation measures such as soil densification.
Landslides and Slope Instability: Seismically induced landslides and rockfalls pose a risk in the Santa Rosa Mountains and Indio Hills, particularly where steep terrain and fractured rock formations exist.
Ground accelerations exceeding 0.10g in these areas could trigger slope failures, potentially impacting roadways, homes, and utilities.
Fire Following Earthquakes: Broken gas lines and electrical failures can ignite post-earthquake fires, a significant concern in densely built urban areas. If fire suppression capabilities are impaired due to water main breaks or blocked roadways, fire hazards could escalate quickly.
Location and Geographic Extent
Local Hazard Mitigation Plan Update
78 Cathedral City is located in a seismically active region of Southern California and is at significant risk of earthquakes due to its proximity to several major fault systems. The city is situated within Riverside County, an area classified as having high seismic hazard potential. Multiple active faults in the vicinity are capable of generating moderate to severe earthquakes that could result in strong ground shaking, structural damage, and secondary hazards such as liquefaction and landslides.
Key fault systems that influence Cathedral City’s seismic risk include:
• San Andreas Fault – The San Andreas Fault is the most significant seismic threat to Cathedral City. This right-lateral strike-slip fault extends through the Coachella Valley and is capable of producing earthquakes exceeding magnitude 8.0. A major rupture of the southern se gment of the San Andreas Fault could result in violent shaking, widespread infrastructure damage, and significant disruptions to critical lifelines such as freeways, power lines, and aqueducts.
• San Jacinto Fault – The San Jacinto Fault, which runs through Riverside County, has a history of producing moderate to large earthquakes. This fault is capable of generating magnitude 7.0 earthquakes, with shaking intensities strong enough to cause significant structural damage.
Local Hazard Mitigation Plan Update
79 • Banning Fault – A segment of the San Andreas Fault system, the Banning Fault extends near Cathedral City and presents a risk of moderate-to-large earthquakes. Ground shaking from this fault could cause structural damage and disrupt transportation networks. • Elsinore Fault – Though farther west, the Elsinore Fault has the potential to generate magnitude
7.1 earthquakes. While its impact on Cathedral City would be less severe than the San Andreas or San Jacinto Faults, it could still contribute to regional seismic activity The California Geological Survey (CGS) and U.S. Geological Survey (USGS) have identified Cathedral City as an area with a moderate-to-high risk of liquefaction, particularly in the northern portion of the city near the San Andreas Fault. Liquefaction occur s when loose, water -saturated soils lose their strength during an earthquake, potentially causing buildings, roads, and underground utilities to sink or tilt.
Relationship to Land Use and Development
Cathedral City has a mix of residential, commercial, and industrial development, all of which have varying levels of vulnerability to seismic hazards. The city’s land use and development patterns influence its overall risk exposure and the extent of potential earthquake damage.
Residential Areas: Many of Cathedral City’s residential neighborhoods contain a mix of single -family homes and multi-family units. Structures built before California's modern seismic codes (introduced in the 1970s) may be particularly vulnerable to damage. Homes with unrein forced masonry, soft -story designs, or older foundations are at greater risk of collapse or severe structural damage during strong ground shaking.
Commercial and Industrial Zones: Cathedral City has several commercial and industrial districts that house a variety of businesses, including retail centers, hotels, and light manufacturing facilities. These areas contain critical infrastructure such as power substations, water treatment plants, and major roadways. Unreinforced masonry buildings, non -ductile concrete structures, and older industrial facilities are particularly susceptible to earthquake damage, potentially leading to hazardous materials spills, business disruptions, and supply chain interruptions.
Critical Infrastructure and Public Facilities: Several critical infrastructure systems in Cathedral City could be severely impacted by a major earthquake, including:
Local Hazard Mitigation Plan Update
80 • Water and Sewer Systems: Underground water mains and sewer lines are vulnerable to rupture during earthquakes. Damage to these systems could disrupt water supply and wastewater treatment operations.
• Electric and Natural Gas Utilities: Cathedral City is served by Southern California Edison (SCE) for electricity and Southern California Gas Company for natural gas. Earthquakes could damage substations, transmission lines, and pipelines, increasing the ri sk of prolonged power outages and gas leaks.
• Transportation Networks: Key transportation routes, including Interstate 10, Date Palm Drive, and East Palm Canyon Drive (State Route 111), are essential for emergency response and economic activity. An earthquake could cause road damage, bridge collapses, and traffic congestion, severely affecting mobility within and beyond the city.
Cathedral City has several areas susceptible to liquefaction, particularly in the northern portion of the city near the San Andreas Fault. The California Geological Survey classifies this area as having moderate to high liquefaction potential, due to shall ow groundwater levels and unconsolidated sandy soils.
Liquefaction can cause severe ground instability, structural collapse, and damage to underground utilities.
By contrast, the southern portion of Cathedral City, near the Santa Rosa Mountains, has a low risk of liquefaction due to deeper groundwater levels and coarser sediments such as gravel, cobbles, and boulders. However, this area is more vulnerable to seism ically induced landslides, particularly where steep slopes exist.
Seismically Induced Settlement is another concern for Cathedral City, particularly in areas where loose, recently deposited sediments are present. Strong ground shaking can cause soils to compact, leading to uneven settlement of buildings, pipelines, and r oadways. Proper foundation design, soil compaction, and geotechnical investigations are critical in mitigating these risks.
Magnitude and Severity
Earthquake severity is measured using two primary scales: magnitude, which quantifies the energy released at the earthquake’s source, and intensity, which describes the observed effects on people, structures, and the environment at different locations.
The Moment Magnitude Scale (Mw) is the most widely used measure of earthquake size, replacing the older Richter Scale. It quantifies the total energy released by an earthquake by considering fault length, slip amount, and rock rigidity. The Richter Scale, developed in 1935, assigns a logarithmic magnitude value to seismic events, where each whole-number increase represents a tenfold increase in amplitude and approximately 32 times more energy release.
Local Hazard Mitigation Plan Update
81 Magnitude Classifications:
• Minor (Mw <3.0) – Generally not felt but recorded by seismographs. • Light (Mw 3.0–4.9) – Often felt but rarely causes damage. • Moderate (Mw 5.0–5.9) – Can cause damage to poorly built structures. • Strong (Mw 6.0–6.9) – Can cause widespread damage, particularly near the epicenter. • Major (Mw 7.0–7.9) – Causes significant destruction over a large area. • Great (Mw 8.0+) – Capable of catastrophic damage and widespread impact.
The Modified Mercalli Intensity (MMI) Scale categorizes earthquakes based on their observed effects on people, buildings, and natural features. It is measured on a Roman numeral scale from I (Not Felt) to XII (Total Destruction). Unlike magnitude, which re mains constant for a given earthquake, MMI values vary by location based on distance from the epicenter, soil composition, and building vulnerability.
Intensity Levels:
• I – Instrumental: Not felt except by very sensitive instruments. • IV – Light: Felt indoors by many, outdoors by few; no damage. • VII – Very Strong: Noticeable damage to buildings; furniture overturned. • IX – Violent: Severe damage, some buildings collapse. • XII – Catastrophic: Total destruction; ground movement visible.
Cathedral City faces a high risk of strong ground shaking due to its proximity to the San Andreas Fault, the San Jacinto Fault Zone, and the Pinto Mountain Fault. Based on USGS ShakeMap projections, a magnitude 7.0–8.0 earthquake on the San Andreas Fault c ould generate Modified Mercalli Intensity (MMI) IX (Violent) to MMI X (Extreme) shaking in Cathedral City. This level of seismic intensity could lead to severe infrastructure damage, widespread power outages, ruptured water and gas pipelines increasing fire risks, and liquefaction hazards in areas with water -saturated soils, particularly in low- lying and industrial zones.
Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County
FEMA
Declaration
String
Calendar
Year of
Declaration
Date
Month
Declaration
Date Declaration Title State
Earthquake Riverside
County DR-845-CA 1990 April 4/6/1990 EARTHQUAKE CA
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82 Incident
Subcategory County
FEMA
Declaration
String
Calendar
Year of
Declaration
Date
Month
Declaration
Date Declaration Title State
Earthquake Riverside
County DR-1008-CA 1994 January 1/17/1994 NORTHRIDGE EARTHQUAKE CA Earthquake Riverside
County DR-1577-CA 2005 February 2/4/2005
SEVERE STORMS, FLOODING,
DEBRIS FLOWS, AND
MUDSLIDES*
CA
Earthquake Riverside
County DR-4301-CA 2017 February 2/14/2017
SEVERE WINTER STORMS,
FLOODING, MUDSLIDES, DEBRIS
FLOWS*
CA
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
June 28, 1992 Earthquakes Riverside, San Bernardino
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Cathedral City is situated in one of the most seismically active regions in the United States, with a history of moderate to strong earthquakes impacting the Coachella Valley and surrounding areas. Due to its location near major fault systems, the city remains vulnerable to significant seismic events. Several notable earthquakes have affected the region:
1992 Landers Earthquake (Magnitude 7.3)
• Date: June 28, 1992
• Epicenter: Landers, approximately 50 miles northeast of Cathedral City • Impacts: Strong shaking caused structural damage to buildings and roads throughout Riverside and San Bernardino counties
• Economic Losses: Estimated at $92 million
• FEMA Major Disaster Declaration: DR-937-CA.
1992 Big Bear Earthquake (Magnitude 6.5)
• Date: June 28, 1992 (same day as Landers earthquake)
• Epicenter: Big Bear, California
• Impacts: Additional structural damage across Southern California, secondary impacts in Coachella Valley
• FEMA Major Disaster Declaration: DR-937-CA.
1999 Hector Mine Earthquake (Magnitude 7.1)
Local Hazard Mitigation Plan Update
83 • Date: October 16, 1999
• Epicenter: Mojave Desert, California
• Impacts: Felt across Cathedral City, moderate damage to roads and structures in nearby desert regions but limited direct impact to the city.
2010 Mexicali Earthquake (Magnitude 7.2)
• Date: April 4, 2010
• Epicenter: Baja California, Mexico, near the U.S. border • Impacts: Strong shaking felt throughout Southern California, including Cathedral City; moderate infrastructure damage in Imperial County, California.
Probability and Effects of Future Conditions
Overall probability over next five years: Moderate.
Seismic risk in Cathedral City is assessed using Probabilistic Seismic Hazard Analysis (PSHA), which estimates the likelihood of various levels of ground shaking over time. The United States Geological Survey (USGS) and the California Geological Survey (CG S) provide earthquake probability models based on historical seismic activity, fault slip rates, and regional geologic conditions.
The 2024 Uniform California Earthquake Rupture Forecast (UCERF3) estimates a 72% probability of a magnitude 6.7 or greater earthquake in Southern California within the next 30 years. The most significant earthquake risks to Cathedral City come from the San Andreas Fault, the San Jacinto Fault Zone, and the Banning Fault. The Coachella Valley segment of the San Andreas Fault, which runs directly through the northern portion of Cathedral City, has the potential to generate earthquakes ranging from magnitude 7.0 to 8.3. A rupture of this fault could cause violent ground shaking (Modified Mercalli Intensity X–XII), resulting in severe damage to buildings, infrastructure, and transportation networks.
The San Jacinto Fault Zone, located west of Cathedral City, has historically experienced moderate-to- large earthquakes, including a magnitude 7.0 event. This fault exhibits strain accumulation, indicating a heightened probability of seismic activity in the near future. The Banning Fault, which crosses Cathedral City’s planning area, has the potential to generate a magnitude 7.4 earthquake, capable of producing peak ground accelerations between 0.45g and 0.9g, leading to severe infrastructure damage.
Local Hazard Mitigation Plan Update
84 Seismic intensity maps classify Cathedral City as a high-risk zone for strong ground motion, particularly in areas with loose alluvial soils near the San Andreas Fault and Banning Fault. Liquefaction modeling from the California Geological Survey (CGS) identifies portions of the city, especially in the northern planning area, as highly susceptible to ground failure due to shallow groundwater and unconsolidated sediments. During strong shaking, these conditions could lead to soil liquefaction, resulting in building collapses, road failures, and utility line disruptions.
Recent geophysical studies suggest that multi -fault ruptures -where multiple faults rupture simultaneously-are more common than previously thought. If the San Andreas Fault and San
Jacinto Fault rupture together, the resulting earthquake could exceed magnitude 8.0, causing catastrophic regional damage and prolonged recovery periods.
Impacts of Future Earthquakes
• Structural Damage: Many industrial and commercial structures in Cathedral City were built before modern seismic building codes were adopted. Older buildings, particularly unreinforced masonry structures and pre -1970s tilt -up concrete buildings, face a higher probability of structural failure during a significant earthquake.
• Transportation and Infrastructure Disruptions: A magnitude 7.5+ earthquake could cause severe damage to Interstate 10, State Route 111, bridges, and overpasses, impeding emergency response and evacuation efforts.
• Water and Utility Failures: The city’s water distribution system and natural gas pipelines are vulnerable to rupture during seismic events, increasing the risk of post -earthquake fires and prolonged service disruptions.
• Economic and Social Disruptions: A major earthquake could lead to significant economic losses, business closures, and displacement of residents, particularly in mobile home parks and high - density housing units.
While climate change does not directly cause earthquakes, it can exacerbate secondary seismic hazards such as landslides and post-seismic flooding. Prolonged drought conditions can lead to soil instability, increasing the likelihood of seismically induced landslides on steep slopes in and around Cathedral City. Additionally, intense atmospheric river storms projected to increase with climate change may contribute to post-earthquake flooding, further complicating emergency response efforts.
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Local Hazard Mitigation Plan Update
86 3.3.6 Flooding
Description
Flooding in Cathedral City results from a combination of heavy precipitation, stormwater runoff, infrastructure limitations, and drainage system failures. The city’s location in the Coachella Valley, along with its proximity to the Whitewater River and surrounding mountainous terrain, significantly influences its flood risk profile.
Urban and Stormwater Flooding: Cathedral City’s urbanized environment features extensive impervious surfaces, including roads, parking lots, and commercial developments, which reduce natural water absorption and increase stormwater runoff. The city’s storm drain system is aging, minimal, and undersized in some areas, leading to localized flooding when rainfall exceeds the system’s capacity. Low-lying intersections and areas such as along Date Palm Drive, Ramon Road, Vista Chino, and Varner Road-are particularly vulnerable to temporary street flooding during heavy rain events.
Flash Flooding: Due to its desert climate and the presence of steep slopes in the Santa Rosa and San Jacinto Mountains, Cathedral City is vulnerable to flash flooding. Intense rainfall over a short duration can overwhelm natural drainage channels and stormwater infrastru cture, leading to sudden and hazardous flood conditions. The Eagle Canyon and Cathedral Canyon drainages had historically funneled floodwaters and debris into developed areas. In the past 30 years the Riverside County Flood Control District (RCFCD) has completed the East and West Cathedral Canyon Flood Control Channels, respectively and in the past 6 years has completed the Eagle Canyon Dam Project, which collectively have reduced flooding due to flash flooding in the Cove neighborhood and along East Palm Canyon Drive.
Riverine Flooding: Although the Whitewater River is the primary drainage channel for the region, it can experience high flows during major storm events, potentially contributing to flood risks in Cathedral City. The river drains approximately 720 square miles and can generate storm flows of up to 47,000 cubic feet per second during a 100-year storm event.
Infrastructure-Related Flooding: Flooding in Cathedral City can also result from failures or limitations in stormwater management infrastructure. The city’s storm drain system, particularly in older developed areas, includes undersized pipelines that struggle to handle heavy runoff. Area s north of Interstate 10 and neighborhoods along major roadways have been identified as vulnerable to nuisance flooding due to outdated or insufficient drainage systems.
Local Hazard Mitigation Plan Update
87 Groundwater and Drainage Basin Flooding: Although Cathedral City is not prone to coastal or tidal flooding, rising groundwater levels and the limited capacity of stormwater retention basins can contribute to localized flood risks.
Location and Geographic Extent
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88 Local Hazard Mitigation Plan Update
89 Flooding in Cathedral City is not uniformly distributed across the city, as certain areas are more vulnerable due to elevation differences, drainage limitations, and surrounding land use. The city’s flood risk is influenced by its position within the Coach ella Valley and its reliance on regional stormwater management systems, including the Whitewater River Channel and Cathedral Canyon Drainages.
Roadways and Intersections with Recurring Flooding Issues: Several roadways and intersections in Cathedral City experience frequent temporary flooding during heavy rain events, particularly in low- lying areas where storm drains have limited capacity or are blocked by debris. Major arterial roads with extensive paved surfaces, lack of stormwater undercrossing infrastructure, and limited adjacent natural absorption are particularly susceptible. Historically, areas near Vista Chino and Landau Boulevard, Vista Chino and Horizon Road, Date Palm Drive and Los Gatos Road, Dinah Shore Drive between Date Palm Drive and Cathedral Canyon, and Gerald Ford Drive at Plumley Road have been prone to flood- related disruptions. These roads are critical to local and regional mobility, and temporary closures due to stormwater accumulation can create significant traffic delays. Additionally, the area bounded by McCallum Way, Avenida Maravilla, Landau Blvd and Vista Chino, as well as the region near Date Palm Drive, Ramon Road, Landau Blvd and Tortuga Road, have experienced periodic flooding events due to drainage constraints.
Industrial and Commercial Zones with High Runoff Volume: Cathedral City’s commercial and industrial areas contain extensive impervious surfaces, which prevent natural rainwater infiltration and contribute to increased stormwater runoff. Warehouses, shopping centers, and large paved parking lots exacerbate flooding risks, particularly in areas where older drainage infrastructure is insufficient to handle high-intensity rainfall. The Cathedral City Marketplace, along Date Palm Drive and Dinah Shore Drive , is one such location where stormwater ponding in parking areas has historically disrupted business operations and increased vehicle damage risks. Industrial zones along Ramon Road, Cathedral Canyon Drive, and Perez Road face additional risks, particularly in areas where large-scale runoff can overwhelm stormwater drainage capacity. In some cases, localized flooding may also pose risks of hazardous material exposure if floodwaters reach industrial sites with chemical storage.
Storm Drain Infrastructure and Flood Control Channels: Cathedral City relies on an extensive stormwater drainage network, including underground storm drains and open -channel flood control systems. The Whitewater River Channel is the primary flood control facility in the region, draining approximately 720 square miles and capable of handling 100-year storm flows of 47,000 cubic feet per second (cfs). The Cathedral Canyon Drainages, including the West and East Cathedral Canyon Channels, direct runoff from the Santa Rosa Mountains into the Whitewater River Stormwater Channel. These drainage corridors play a critical role in diverting stormwater away from developed areas but can become overwhelmed during extreme rainfall events.
Local Hazard Mitigation Plan Update
90 Storm drain outfalls near the Whitewater River and the Cathedral Canyon Drainages may experience temporary backups during heavy rainfall, leading to localized street flooding in adjacent neighborhoods. Improvements to these systems, including revetment and channel armoring projects, have been ongoing to mitigate erosion and reduce flood risks.
Retention basins in Cathedral City provide temporary storage for excess runoff, helping to prevent major flooding in urbanized areas. However, during extreme rainfall events, these basins may exceed their design capacity, leading to additional flood risks. The Eagle Canyon Dam, constructed in response to past damaging floods, plays a key role in stormwater detention and has significantly reduced flood impacts in western Cathedral City.
Relationship to Land Use and Development
Flood hazards in Cathedral City are closely tied to land use and development patterns, particularly in industrial, commercial, and residential corridors where high levels of impervious surfaces increase stormwater runoff. Future urban development, combined with projected climate change impacts, will further influence flood risks, necessitating improved land use planning and infrastructure adaptation.
Industrial and Commercial Development Impact on Flooding : Cathedral City's extensive commercial and industrial base has significantly altered natural drainage patterns, increasing reliance on engineered stormwater management solutions. Industrial growth in areas near Perez Road and East Palm Canyon Drive has led to the expansion of paved surfaces, contributing to increased stormwater runoff during heavy storms. Older industrial zones with outdated drainage infrastructure remain particularly vulnerable. Deve lopments near Landau Boulevard and Ramon Road were built before modern stormwater retention requirements were implemented, leading to periodic flooding when storm drains reach capacity. Future redevelopment in these areas will need to incorporate updated s tormwater management strategies, such as permeable pavement, bioswales, and retention basins, underground storage chambers to reduce flood risks.
Transportation Infrastructure and Flood Exposure: Cathedral City's major transportation corridors, including Interstate 10, East Palm Canyon Drive, and Date Palm Drive, are critical to regional mobility and commerce. Flooding on these routes can disrupt commuter traffic, emergency response operations, and freight movement, causing economic and logistical disruptions. Past flood events have led to temporary lane closures and delays along Dinah Shore Drive, Date Palm Drive, and Gerald Ford Drive, affecting access to businesses and residential areas. The I-10 corridor near between Palm Drive and Bob Hope Drive is a known flood-prone area, particularly during extreme storm events when runoff from nearby desert slopes converges into low-lying sections of the freeway. The closure of lanes along I-10 Local Hazard Mitigation Plan Update
91 withing this corridor occurred as recent as August of 2023, as a result of Tropical Storm Hilary water and mud flows.
Magnitude and Severity
Flood severity in Cathedral City is assessed using national hydrologic classification systems and local urban hydrology models. Factors such as flood depth, frequency, velocity, and the performance of stormwater infrastructure play a significant role in determining the impacts of flooding within the city.
FEMA Flood Zone Designations
FEMA’s Flood Insurance Rate Maps (FIRMs) categorize flood hazards based on probability and expected inundation levels:
• Zone X (Minimal Risk): The majority of Cathedral City falls into this category, indicating a low probability of large -scale flooding. However, localized stormwater flooding remains a persistent hazard, especially in areas with outdated or undersized drainage infrastructure. • Zone A (High -Risk 100 -Year Floodplain): Areas near the Whitewater River and Cathedral Canyon Wash are mapped within this high-risk flood zone, particularly where historical flood events have occurred. FEMA requires properties in these zones to carry flood insurance if they have federally backed mortgages.
While large-scale riverine flooding is not a major concern for Cathedral City, urban flooding caused by storm drain capacity exceedance remains a significant issue during heavy precipitation events.
Local Flood Severity Analysis
Flood severity is further analyzed using urban hydrology models, which assess:
• Runoff Coefficients: Cathedral City's high proportion of impervious surfaces, including roadways and commercial developments, contributes to elevated runoff, increasing the risk of urban flooding during high-intensity storms.
• Stormwater System Capacity: The city’s storm drains and retention basins, particularly in older neighborhoods and industrial corridors, may not be sufficient to handle extreme storm events.
Infrastructure along major arteries, such as Date Palm Drive and Ramon Road, and Date Palm and Los Gatos Drive has been identified as vulnerable to capacity exceedance.
Local Hazard Mitigation Plan Update
92 • Flow Velocity and Debris Accumulation: Areas near the Whitewater River Channel and Cathedral Canyon Wash may experience high-velocity runoff, which can exacerbate erosion, cause structural damage, and transport debris into roadways.
Severity of Flooding
The magnitude of flooding in Cathedral City varies depending on storm intensity, drainage performance, and land use patterns:
• Minor Flooding occurs during moderate rainstorms when storm drains experience temporary blockages, leading to localized ponding in intersections and parking lots. These conditions typically resolve within hours.
• Moderate Flooding is less frequent but results from high-intensity rainstorms exceeding 1 inch per hour. This type of flooding temporarily overwhelms drainage systems, causing road closures on key transportation routes such as East Palm Canyon Drive and Date Palm Drive. Industrial and commercial properties in flood -prone areas may experience water infiltration, leading to operational disruptions and minor structural damage.
• Major Flooding is rare but can occur during extreme precipitation events, such as atmospheric river storms or back -to-back heavy rainfall systems. Such events could lead to significant infrastructure failures, particularly in areas reliant on aging stormwater infrastruc ture.
Floodwaters could inundate commercial and industrial zones, resulting in economic losses and potential contamination of stormwater with hazardous materials from nearby facilities.
Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County
FEMA
Declaration
String
Calendar Year
of Declaration
Date
Month
Declaration
Date Declaration Title State
Flood Riverside
County DR-253-CA 1969 January 1/26/1969 SEVERE STORMS & FLOODING CA Flood Riverside
County DR-595-CA 1979 August 8/24/1979 SEVERE STORMS, FLOODING,
AND MUDSLIDES CA
Flood Riverside
County DR-979-CA 1993 February 2/3/1993
SEVERE WINTER STORM,
MUD & LAND SLIDES, &
FLOODING
CA
Flood Riverside
County DR-1046-CA 1995 March 3/12/1995
SEVERE WINTER STORMS,
FLOODING, LANDSLIDES,
MUD FLOW
CA
Local Hazard Mitigation Plan Update
93 Incident
Subcategory County
FEMA
Declaration
String
Calendar Year
of Declaration
Date
Month
Declaration
Date Declaration Title State
Flood Riverside
County DR-1203-CA 1998 February 2/9/1998 SEVERE WINTER STORMS
AND FLOODING CA
Flood Riverside
County DR-1577-CA 2005 February 2/4/2005
SEVERE STORMS, FLOODING,
DEBRIS FLOWS, AND
MUDSLIDES
CA
Flood Riverside
County DR-1585-CA 2005 April 4/14/2005
SEVERE STORMS, FLOODING,
LANDSLIDES, AND MUD AND
DEBRIS FLOWS
CA
Flood Riverside
County DR-1884-CA 2010 March 3/8/2010
SEVERE WINTER STORMS,
FLOODING, AND DEBRIS AND
MUD FLOWS
CA
Flood Riverside
County DR-4305-CA 2017 March 3/16/2017 SEVERE WINTER STORMS,
FLOODING, AND MUDSLIDES CA
Flood Riverside
County DR-4683-CA 2023 March 3/10/2023
SEVERE WINTER STORMS,
FLOODING, LANDSLIDES, AND
MUDSLIDES
CA
Flood Riverside
County DR-4777-CA 2024 February 2/18/2024
SEVERE STORMS AND
FLOODING (related to Hurricane
Hilary aftermath)
CA
Flood-related declared disasters in the vicinity of the Coachella Valley, 1953-2024. Source: FEMA California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None (events causing flooding
mostly categorized under “Storms”)
None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization While Cathedral City is not classified as a high -risk flood zone under FEMA’s Flood Insurance Rate Maps (FIRMs), the city has been included in several federally declared disasters related to severe storms, flooding, and stormwater infrastructure impacts. These events have triggered access to federal recovery resources under the Stafford Act, supporting storm response, infrastructure repair, and resilience investments.
• FEMA DR-4305 (March 2017 – Severe Winter Storms, Flooding, and Mudslides): This disaster declaration covered widespread damages across Riverside County, including Cathedral City.
The city experienced roadway flooding, storm drain overflows, and localized infrastructure disruption during a sequence of severe winter storms.
• FEMA DR-4434 (February 2019 – Valentine’s Day Flood): Although Cathedral City was not named in the primary declaration, FEMA issued a federal disaster declaration for the Cahuilla Band of Indians following heavy rainfall and flash flooding on February 14, 2019, which Local Hazard Mitigation Plan Update
94 severely impacted Tribal lands within the region. These events highlight the broader Coachella Valley’s susceptibility to localized flood and mudflow hazards during high -intensity rainfall events, even in areas outside designated FEMA flood zones. • FEMA DR -4683 (January 2023 – Atmospheric River Storms): This declaration followed a sequence of powerful atmospheric river events that brought widespread flooding and
high winds to Southern California. In Cathedral City, impacts included localized road closures, temporary power outages, and strain on stormwater management infrastructure. • FEMA DR -4699 (March 2023 – Additional Atmospheric River Flooding): This follow -up declaration was issued after consecutive storm systems in March 2023 triggered further flooding, erosion, and drainage issues across Riverside County, including areas of Cathedral City. Transportation corridors and stormwater systems were ag ain impacted, reinforcing the city’s vulnerability to extreme precipitation events under changing climate conditions.
Probability and Effects of Future Conditions
Overall probability over next five years: Unlikely.
Severe flooding events in Cathedral City are projected to increase in frequency and intensity due to climate change and continued urban development. Historical flood data, climate modeling, and stormwater infrastructure analysis indicate that short -duration, high -intensity rainfall events are becoming more frequent, potentially exceeding the capacity of existing drainage systems. Studies suggest that extreme precipitation events in California cities will continue intensifying, leading to heightened urban flooding risks.
Cathedral City experiences flood risks primarily from stormwater runoff and overflow from the Whitewater River and Cathedral Canyon drainage systems. The Whitewater River drains a vast watershed of approximately 720 square miles, and 100-year storm flows at Cathedral City are estimated at 47,000 cubic feet per second. Standard Project Flood (SPF) modeling suggests that in extreme cases, flow volumes could reach 85,000 cubic feet per second, with a recurrence interval of approximately 500 years.
Future Rainfall and Urban Flooding Risks: By 2050, climate models predict an increase in the intensity of atmospheric river storms, leading to longer periods of stormwater system overload and surface flooding. Storm drain exceedance models indicate that a 10-year return period storm could overwhelm existing drainage infrastructure in commercial and industrial areas, leading to prolonged flooding in key transportation corridors. Intersections with historical drainage challenges, such as Date Palm Drive and Ramon Road, as well as Dinah Shore Drive between Date Palm and Cathedral Canyon, are expected to experience increased stormwater accumulation.
Local Hazard Mitigation Plan Update
95 Pavement drainage analysis suggests that critical intersections and low -lying streets will likely see higher flood depths during extreme precipitation events, leading to road closures, vehicle stall -outs, and emergency response delays. By 2070, extreme precipitation events exceeding
historical norms may become twice as frequent, increasing the probability of storm drain failures and localized ponding in both residential and industrial districts.
Development and Impervious Surface Impacts: Continued industrial and commercial development in Cathedral City will increase impervious surface coverage, reducing natural water absorption and increasing stormwater runoff. Currently, a significant portion of developed land in Cathedral City consists of impervious surfaces, including roadways, parking lots, and building footprints, contributing to elevated flood risks. Without enhanced stormwater management measures, future development may further exacerbate t hese challenges. New projects in high -risk flood areas will require mitigation strategies such as retention basins, bioswales, and permeable pavement systems to reduce runoff volume.
Storm Drain System Overload and Infrastructure Adaptation Needs: Existing storm drain infrastructure in Cathedral City is designed based on historical rainfall data, but climate change projections indicate that future storm events will more frequently exceed system capacity. Areas around McCallum Way, Avenida Maravilla, and Vista Chino have been identified as having higher stormwater accumulation risks. Additionally, storm drain outfalls near Whitewater River may experience temporary backups during heavy precipitation events, further increasing localized flooding risks.
By 2050, the probability of storm drain backups causing localized flooding is expected to increase significantly. Infrastructure adaptation measures, including expanded stormwater capacity, green infrastructure solutions, and increased maintenance of exist ing systems, will be necessary to mitigate future flood risks.
Projected Economic and Infrastructure Impacts : Economic damages from flooding in Cathedral City are expected to rise by 2050 due to the increasing frequency of storm events and continued urbanization. Roadway repair costs related to flood damage, particularly along major corridors like East Palm Canyon Drive and Date Palm Drive, could increase as recurring storm events degrade pavement conditions and drainage infrastructure. Flood-related business disruptions, particularly in commercial and industrial zones, may also lead to increased economic losses.
Local Hazard Mitigation Plan Update
96 Local Hazard Mitigation Plan Update
97 3.3.7 High wind/storms
Description
High wind events in Southern California stem from various meteorological phenomena, including Santa Ana winds, thunderstorm -related winds, and strong frontal systems. These events pose significant risks to infrastructure, utilities, and public safety.
Santa Ana Winds: Originating from high-pressure systems over the Great Basin, Santa Ana winds are dry, warm, and gusty northeast winds that blow from the interior of Southern California toward the coast and offshore. As these winds descend through mountain passes and canyons, they accelerate and warm, leading to extremely dry conditions. These winds are most common between September and April, with peak activity in the fall and early winter months. During strong events, wind speeds can reach sustained levels of 50 to 70 mph, with gusts exceeding 100 mph in certain locations. Santa Ana winds significantly increase wildfire risks by rapidly spreading flames through dry vegetation, leading to large-scale fire disasters and declared emergencies.
Thunderstorm and Downburst Winds: Thunderstorm-related winds result from rapid downdrafts, creating damaging straight-line winds. Downburst winds occur when storm clouds collapse, forcing a powerful surge of air toward the ground. These winds can reach speeds of 60 to 80 mph and are capable of uprooting trees, damaging power lines, and disrupting transportation networks. The force of these winds poses risks to aviation, utility infrastructure, and buildings, particularly those constructed before modern wind-resistant building codes were in place.
Gradient Winds from Storm Systems: Large-scale storm systems moving through Southern California generate strong gradient winds, particularly during winter storms. These winds develop when intense pressure differences drive sustained wind speeds of 40 to 60 mph, with higher gusts in areas with open terrain or near passes and canyons. Winter frontal storms associated with the Pacific jet stream often lead to long-duration high wind events, which can cause widespread utility outages, structural damage, and disruptions to transportation corridors.
In Cathedral City, high wind events have had tangible impacts on local events and infrastructure. For instance, in November 2024, dangerous weather conditions led to the cancellation of the final competition flight at the 10th Annual Cathedral City Hot Air Balloon Festival due to high winds, highlighting the challenges such conditions pose to outdoor activities and public gatherings.
Location and Geographic Extent
Local Hazard Mitigation Plan Update
98 Cathedral City is susceptible to high wind events, notably the Santa Ana winds. These winds originate from high-pressure systems over the Great Basin and flow towards the coast,
accelerating through mountain passes such as the San Gorgonio Pass, which is in proximity to Cathedral City. As these winds descend, they warm and dry, leading to extremely low humidity levels. Santa Ana winds are most prevalent between September and April , with peak activity during the fall and early winter months. The National Weather Service notes that these winds can reach sustained speeds exceeding 40 mph, with gusts surpassing 60 mph during extreme events.
The topography of Cathedral City, characterized by its location within the Coachella Valley and near the San Gorgonio Pass, influences wind flow and intensity. The city’s open desert landscape allows winds to accelerate, particularly affecting areas with wide, open spaces such as industrial corridors and major transportation routes. These locations are especially vulnerable to wind -related hazards, including debris, downed power lines, and structural damage. The California State Hazard Mitigation Plan ident ifies utility disruptions, infrastructure damage, and wildfire ignition from wind -driven embers as primary risks associated with high wind events.
Relationship to Land Use and Development
In Cathedral City, land use and development patterns significantly influence the impact of high wind events:
• Industrial Areas: The city hosts numerous industrial and warehouse facilities, many featuring lightweight roofing materials and expansive structures prone to wind damage. These buildings can act as wind catchers, making them susceptible to roof failures, siding detachment , and accumulation of hazardous debris during strong wind events. Additionally, industrial zones often store hazardous materials, presenting further risks if containment systems are compromised.
• Transportation Corridors : Major highways and rail lines traverse Cathedral City, making transportation infrastructure vulnerable to wind -related disruptions. High -profile vehicles, such as trucks and trailers, are at risk of overturning during strong winds, leading to road closures and accidents. Debris, including fallen trees and damaged signage, can obstruct roadways, while rail operations may face disruptions due to overhead power line failures or debris on tracks.
• Residential Neighborhoods : Areas with mature trees and above -ground power lines are at increased risk of power outages and property damage. High winds can break large tree limbs, causing significant damage to homes and vehicles. Wind -driven debris, such as loose roofing Local Hazard Mitigation Plan Update
99 materials and outdoor furniture, can become projectiles, posing additional safety hazards. Older homes constructed before modern building code updates may lack adequate wind -resistant features, increasing their susceptibility to structural damage. • Critical Infrastructure : High winds pose substantial threats to power distribution systems, communication networks, and emergency response operations. Downed power lines can lead to extended outages, disrupting businesses and essential services. In extreme cases, power failures can hinder emergency response efforts by disabling traffic signals, communication towers, and public safety facilities. Utility companies may implement Public Safety Power Shutoffs during extreme wind events to reduce wildfire risk, but these measures also introduce challenges for residents and businesses reliant on uninterrupted power supply.
Magnitude and Severity
Understanding the magnitude and severity of high wind events in Cathedral City requires the use of standardized meteorological scales that quantify wind speeds, storm intensity, and associated damage potential. While hurricanes and tornadoes are rare, the region experiences significant risks from Santa Ana winds, winter storms, and atmospheric river events, all of which can impact infrastructure, transportation, and public safety.
https://www.icams-portal.gov/resources/ofcm/fmh/FMH1/fmh1_2019.pdf
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Beaufort Wind Force Scale: The Beaufort Wind Force Scale classifies wind speeds based on their observed effects on land and structures. In Cathedral City, the most relevant categories include:
• Beaufort Force 6-7 (25-38 mph): Strong winds that can displace unsecured objects, impact high- profile vehicles, and accelerate wildfire spread.
• Beaufort Force 8 -9 (39 -54 mph): Gale -force winds capable of breaking tree limbs, causing minor structural damage, and resulting in power outages. • Beaufort Force 10 -11 (55 -73 mph): Storm -force winds that present significant risks to infrastructure, including damage to mobile homes and lightweight structures.
National Weather Service (NWS) High Wind Warning Criteria: The NWS issues alerts based on sustained wind speeds and gusts:
• Wind Advisory: Sustained winds of 31-39 mph or gusts of 46-57 mph for over an hour. • High Wind Warning: Sustained winds of 40+ mph or gusts exceeding 58 mph, with structural damage likely.
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• Extreme Wind Warning: Sustained winds over 115 mph, typically associated with extreme storm conditions.
The severity of high wind hazards depends on several factors, including wind speed, duration, and environmental conditions such as topography and urban development. is particularly vulnerable to three primary types of high wind events:
Santa Ana Winds: Santa Ana winds are warm, dry winds that develop from high-pressure systems over the Great Basin, accelerating as they move downslope into Southern California. These winds can persist for several days and create extreme fire conditions due to low humidity and high temperatures. • Typical sustained wind speeds range from 40 -60 mph, with peak gusts exceeding 80 mph in extreme cases.
• Major impacts include wildfire spread, downed power lines, roadway hazards, and airborne debris, all of which increase emergency response demands. • Historical Santa Ana wind events have resulted in widespread infrastructure damage and FEMA-declared disasters due to fire ignition and rapid flame spread.
Thunderstorm Winds and Microbursts: Severe convective storms can generate strong winds, including microbursts and straight-line winds, which are particularly dangerous due to their sudden onset and localized nature.
• Wind speeds in microbursts can reach 60-100 mph, producing damage comparable to an EF0- EF1 tornado.
• Potential impacts include roof failures, structural collapses, and disruptions to aviation and transportation infrastructure.
Atmospheric River Events: Atmospheric rivers are long, narrow bands of concentrated moisture that bring heavy precipitation and strong winds to California, particularly during winter storm systems.
These events have become more intense due to climate change, leading to increased hazards from both wind and flooding.
• Wind speeds associated with atmospheric rivers typically range from 40 -70 mph, especially along storm fronts.
• Secondary hazards include widespread flooding, road closures, and increased soil saturation, which can lead to landslides.
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Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County
FEMA
Declaration
String
Calendar Year
of Declaration
Date
Month
Declaration
Date Declaration Title State
Severe Storm Riverside
County DR-253-CA 1969 January 1/26/1969 SEVERE STORMS & FLOODING CA Severe Storm Riverside
County DR-547-CA 1978 February 2/15/1978 COASTAL STORMS,
MUDSLIDES & FLOODING CA
Severe Storm Riverside
County DR-595-CA 1979 August 8/24/1979 SEVERE STORMS, FLOODING,
AND MUDSLIDES CA
Severe Storm Riverside
County DR-979-CA 1993 February 2/3/1993
SEVERE WINTER STORM,
MUD & LAND SLIDES, &
FLOODING
CA
Severe Storm Riverside
County DR-1046-CA 1995 March 3/12/1995
SEVERE WINTER STORMS,
FLOODING, LANDSLIDES,
MUD FLOW
CA
Severe Storm Riverside
County DR-1203-CA 1998 February 2/9/1998 SEVERE WINTER STORMS
AND FLOODING CA
Severe Storm Riverside
County DR-1577-CA 2005 February 2/4/2005
SEVERE STORMS, FLOODING,
DEBRIS FLOWS, AND
MUDSLIDES
CA
Severe Storm Riverside
County DR-1585-CA 2005 April 4/14/2005
SEVERE STORMS, FLOODING,
LANDSLIDES, AND MUD AND
DEBRIS FLOWS
CA
Severe Storm Riverside
County DR-1884-CA 2010 March 3/8/2010
SEVERE WINTER STORMS,
FLOODING, AND DEBRIS AND
MUD FLOWS
CA
Severe Storm Riverside
County DR-4305-CA 2017 March 3/16/2017 SEVERE WINTER STORMS,
FLOODING, AND MUDSLIDES CA
Severe Storm Riverside
County DR-4683-CA 2023 March 3/10/2023
SEVERE WINTER STORMS,
FLOODING, LANDSLIDES, AND
MUDSLIDES
CA
Severe Storm Riverside
County DR-4777-CA 2024 February 2/18/2024 SEVERE STORMS AND
FLOODING CA
Flood-related declared disasters in the vicinity of the Coachella Valley, 1953-2024. Source: FEMA
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California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
Early February 2024,
beginning February 3
Severe winter storms Alameda, Butte, Glenn, Humboldt, Lake, Los Angeles, Marin, Mendocino, Monterey, Napa, Orange, Riverside, Sacramento, San Bernardino, San Diego, San Francisco, San Luis Obispo, Santa Barbara, Santa Clara, Santa Cruz, Solano, Sonoma, Sutter, Trinity, and Ventura
August 20, 2023 Hurricane Hilary Fresno, Imperial, Inyo, Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Siskiyou, Tulare, and Ventura
ebruary-March 2023 Severe winter storms Alameda, Alpine, Amador, Butte, Calaveras, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Imperial, Inyo, Kern, Kings, Lake, Los Angeles, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sierra, Solano, Sonoma, Stanislaus, Trinity, Tulare, Tuolumne, Ventura, Yolo, and Yuba
September 9, 2022 Tropical Storm Kay Imperial, Inyo, Los Angeles, Riverside, and San Bernardino January-February 2019 Winter storms Amador, Calaveras, El Dorado, Glenn, Humboldt, Lake, Los Angeles, Marin, Mendocino, Modoc, Mono, Monterey, Orange, Riverside, San Bernardino, San Diego, San Mateo, Santa Barbara, Santa Clara, Shasta, Sonoma, Tehama, Trinity, Ventura, Yolo January 2017 Storm System Alameda, Alpine, Amador, Butte, Calaveras, Contra Costa, Del Norte, El Dorado, Fresno, Humboldt, Inyo, Kern, Kings, Lake, Lassen, Los Angeles, Madera, Marin, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Ventura, Yolo, Yuba
July 18, 2015 Rainstorms Imperial, Kern, Los Angeles, Riverside, San Bernardino, San Diego December 2010 – January
2011
Winter storms Inyo, Kern, Kings, Los Angeles, Madera, Mariposa, Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, Tulare
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DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
January 17-21, 2010 Winter storms Calaveras, Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Francisco, Siskiyou
March 2005 Severe rainstorms Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, Ventura
January 2005 Storms Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, Ventura
February 2, 1998 El Niño Alameda, Amador, Butte, Calaveras, Colusa, Contra Costa, Fresno, Glenn, Humboldt, Kern, Kings, Lake, Los Angeles, Marin, Mendocino, Merced, Monterey, Napa, Orange, Riverside,
Sacramento, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Ventura, Yolo, Yuba
January 1995 Severe Winter Storms Alameda, Alpine, Amador, Butte, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Kern, Kings, Lake, Lassen, Los Angeles, Madera, Marin, Mendocino, Modoc, Monterey, Napa, Nevada, Orange, Placer, Plumas, Riverside, Sacramento, San Bernardino, San Diego, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Siskiyou, Solano, Sonoma, Sutter, Tehama, Trinity, Ventura, Yolo, Yuba
December 1992 Late Winter Storms Alpine, Contra Costa, Fresno, Humboldt, Imperial, Lassen, Los Angeles, Madera, Mendocino, Modoc, Monterey, Napa, Orange, Plumas, Riverside, San Bernardino, San Diego, Santa Barbara, Sierra, Siskiyou, Sonoma, Tehama, Trinity, Tulare
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization In December 2011, a significant windstorm affected Southern California, including Cathedral City. This event, driven by a strong pressure gradient over the Great Basin, resulted in sustained winds of 40 -60 mph, with gusts exceeding 80 mph in certain areas. The storm caused widespread power outages, impacting over 400,000 residents, with some outages lasting multiple days. Emergency response teams addressed blocked roadways, damaged commercial signage, and structural failures. Although this event did not trigger a federal disaster declaration, it necessitated substantial state-level emergency response actions.
In February 2017, a powerful atmospheric river event brought damaging winds, heavy rainfall, and localized flooding to Cathedral City and surrounding communities. Wind speeds reached 50 -65 mph, leading to tree falls, property damage, and power disruptions. This storm contributed to FEMA Disaster Declaration DR-4301-CA, which covered multiple counties in Southern California due to storm-related damages, including wind and flood impacts.
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In early January 2023, a series of winter storms driven by atmospheric rivers produced widespread damaging winds and intense rainfall across the region. Cathedral City experienced gusts exceeding 60 mph, resulting in damaged signage, utility failures, and transportation slowdowns. This event led to FEMA Disaster Declaration DR -4683-CA, issued due to the extensive damage across California. The incident underscored the increasing frequency of high -impact storm systems and the necessity for enhanced resilience planning.
In October 2020, a severe Santa Ana wind event impacted Cathedral City, characterized by high wind speeds, dry conditions, and elevated wildfire risks. Wind gusts exceeded 70 mph, causing power outages and hazardous driving conditions. The event coincided with extreme wildfire conditions, with embers from nearby fires traveling considerable distances, increasing ignition risks in urban areas. While no FEMA declaration was issued, local emergency response teams implemented high wind advisories, wildfire mitigation measures, and power shutoff protocols.
FEMA Disaster Declarations Related to High Winds and Storms • FEMA DR -4301-CA (February 2017) : This disaster declaration followed a series of winter storms impacting multiple counties in California, including Riverside County. Cathedral City experienced wind-related damage to structures, utilities, and transportation networks. Federal funding supported public infrastructure repair, flood mitigation, and debris removal efforts. • FEMA DR -4683-CA (January 2023) : Declared in response to severe winter storms and atmospheric river impacts across the state, this disaster declaration included Riverside County.
The city faced high wind gusts, localized flooding, and transportation disruptions. Federal assistance facilitated infrastructure repairs and bolstered emergency management efforts.
Probability and Effects of Future Conditions
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Overall probability over next five years: Likely.
While hurricanes and tornadoes remain low -probability hazards in Cathedral City, the region is susceptible to Santa Ana wind events, atmospheric river -driven storms, and convective windstorms.
Climate change is projected to influence the frequency and intensity of these events, thereby affecting their impact on the area.
Wind Speed Probability Models : Wind speed probability models integrate historical wind data, meteorological patterns, and climate projections to estimate the likelihood of high -wind events in Cathedral City. Agencies such as the National Weather Service (NWS), the Federal Emergency Management Agency (FEMA), and the California Governor's Office of Emergency Services (Cal OES) utilize these models to predict wind hazards and inform emergency planning. • Santa Ana Winds: Historically, Southern California experiences approximately 20 to 40 Santa Ana wind events annually, with peak gusts ranging from 40 to 80 mph. Climate projections indicate a potential reduction in the frequency of these events, particularly during the fall and spring seasons, while the intensity during peak months may remain relatively unchanged. • Severe Windstorms: The probability of storm-related winds exceeding 50 mph is estimated at once every 5 to 10 years, primarily resulting from Pacific storm systems. • Extreme Wind Events (60+ mph): Climate models suggest a 1 to 3% annual probability, typically associated with convective thunderstorms, downbursts, or frontal systems.
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Recurrence intervals, or return periods, estimate the likelihood of an event occurring over a given timeframe. Based on historical data from the NWS and FEMA:
• 40-50 mph winds: Expected every 1 to 2 years.
• 50-60 mph winds: Expected every 5 to 10 years.
• 60+ mph winds: Expected every 10 to 25 years.
• 80+ mph winds: Historically rare but possible in Santa Ana wind corridors or during extreme storm events.
Climate models from the National Oceanic and Atmospheric Administration's (NOAA) Geophysical Fluid Dynamics Laboratory (GFDL) and the California Climate Assessment indicate shifts in wind patterns due to atmospheric changes. Santa Ana wind events may decre ase in overall frequency by 2050, especially during the fall and spring, but the intensity during peak months (December and January) is projected to remain relatively stable. t
Winter storm wind speeds are projected to rise by 5 to 10% due to enhanced storm intensities driven by warming Pacific waters and intensified atmospheric rivers. Convective windstorms, including microbursts and downbursts, are expected to become more commo n, with gusts exceeding 60 mph occurring 30 to 50% more frequently by 2050.
Future Projections for Hazard Severity and Frequency
• Santa Ana Winds: While the overall frequency of Santa Ana winds may decrease, particularly in the fall and spring, the intensity during peak months is expected to remain consistent. This stability in intensity could continue to exacerbate wildfire risks and air quality de gradation during these periods. Urban expansion and climate change may increase wind -driven fire hazards, necessitating stricter vegetation management and infrastructure resilience planning. • Pacific Storm Systems: Atmospheric rivers and extratropical cyclones are anticipated to bring stronger winds, particularly during the winter storm season. Wind speeds exceeding 50 mph may become more frequent by 2050, increasing risks of power outages, transportation disruptions, and structural damage. Rain-loaded storm systems will add compounding hazards, including wind-driven tree falls, debris flows, and urban flooding. • Convective Windstorms: Short-duration, high-impact wind bursts, including microbursts and straight-line winds, are projected to increase due to shifting atmospheric instability patterns.
Severe wind gusts exceeding 60 mph from convective storms could occur 30 to 50% more frequently by 2050. Localized storm damage will increase, particularly in exposed areas with aging infrastructure.
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Structural stress on buildings, power lines, and transportation networks is expected to intensify due to higher wind speeds. Wildfire risks will rise as Santa Ana winds maintain their intensity during peak months. Emergency response challenges will also gr ow, requiring updated protocols for wind-related power outages, road closures, and infrastructure failures.
3.3.8 Cyberattack/IT disruption
Description
A cyberattack is a deliberate attempt to infiltrate, damage, or disrupt computer networks, digital infrastructure, or electronic systems. Cyber incidents can result from malicious activities, technical failures, or human error, compromising the confidentia lity, integrity, and availability of critical data and services. Cyber threats pose risks to municipal government operations, emergency response services, utilities, transportation networks, and private sector businesses.
Types of Cyberattacks and IT Disruptions
Cyber threats take multiple forms, each with distinct impacts on essential services and infrastructure. • Ransomware attacks remain one of the most pervasive threats. In a ransomware incident, attackers use malware to encrypt data and systems, demanding payment for decryption. The 2019 Baltimore ransomware attack, for example, cost the city over $18 million an d disrupted Local Hazard Mitigation Plan Update
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municipal services for weeks. If a similar attack occurred in Cathedral City, essential city services, police communications, and business operations could be severely impacted. • Distributed Denial-of-Service (DDoS) attacks flood online services and networks with excessive traffic, causing widespread service outages. In municipal systems, DDoS attacks could cripple online payment portals, emergency alert systems, and public communi cation platforms, impeding critical operations.
• Phishing and social engineering attacks exploit human vulnerabilities to steal credentials, financial information, and other sensitive data. Government agencies, businesses, and residents remain frequent targets of phishing schemes. In 2022 alone, phishing accounted for nearly 40% of all cyber breaches nationwide.
• Malware and spyware attacks involve malicious software that disrupts operations or steals sensitive data. These threats target public and private networks, increasing the risk of system failures and data breaches. A major cyber intrusion could compromise city databases, exposing confidential resident information.
Cyberattacks on critical infrastructure pose one of the most significant risks. Power grids, water treatment facilities, and transportation networks rely on automated control systems vulnerable to hacking. The 2021 Colonial Pipeline ransomware attack, whic h disrupted fuel supply across the East Coast, highlighted the vulnerabilities of essential services. A similar attack on Cathedral City’s infrastructure could result in widespread outages, water service disruptions, or traffic control failures.
Location and Geographic Extent
Cyber threats are not confined by geography but target digital infrastructure, networks, and interconnected systems essential to government operations, businesses, emergency services, and critical utilities. These cyber disruptions can originate from local, regional, or global sources, impacting systems that extend beyond municipal boundaries. Specific sectors and locations are particularly susceptible to cyber-related disruptions due to their reliance on information technology systems, data networks, and automated control mechanisms.
Municipal Government and Emergency Services: Cathedral City’s government offices, police and fire departments, emergency dispatch centers, and public safety systems depend heavily on secure IT networks and digital communications infrastructure. A cyberattack targeting these systems could disrupt 911 call centers, delaying emergency response coordination; compromise police and fire department databases, affecting investigations and resource deployment; or lock city employees out of municipal IT systems, hindering service delivery, financial operations, and public communication.
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Critical Infrastructure and Utility Networks: The city’s power grid, water treatment facilities, wastewater systems, and industrial utility services rely on Supervisory Control and Data Acquisition (SCADA) systems to monitor and regulate infrastructure operations. These SCADA systems provide real-time control of essential services such as electricity distribution, wastewater flow regulation, and potable water treatment processes. A cyberattack on SCADA infrastructure could severely disrupt operations. Such an event could result in the shutdown of power distribution or water supply systems, tampering with water quality settings that could lead to contamination, and disabling industrial controls essential to energy efficiency, air emissions monitoring, and equipment safety protocols. These threats are of increasing concern in hazard mitigation planning given the rise in both targeted attacks and system vulnerabilities in the public infrastructure sector. In August 2024, Halliburton, a global oilfield services provider, experienced a significant cyberattack that led the company to take its systems offline to protect internal data and infrastructure. Although not directly affecting Cathedral City, the incident highlights the growing national risk posed by cyber threats to critical infrastructure operators and industrial control systems, many of which share similar SCADA vulnerabilities.
During Tropical Storm Hilary in August 2023, several communities across the Coachella Valley experienced serious infrastructure disruptions. The storm caused flooding and high winds, and notably severed a fiber -optic line, leading to a regional 911 emergen cy communication outage. In Cathedral City, emergency services successfully rerouted 911 calls to the City’s non -emergency business lines, enabling continuity of emergency response while system repairs were underway. This incident illustrates both the vuln erability of communication infrastructure during compound weather events and the importance of local redundancy planning.
Industrial and Commercial Facilities: Cathedral City hosts numerous industrial facilities, warehouses, and distribution centers that depend on automated logistics systems, digital inventory management, and online supply chain coordination. A cyberattack on industrial networks could disrupt manufacturing and supply chain operations, causing financial losses and shipment delays; shut down automated equipment, leading to safety hazards and operational inefficiencies; and expose sensitive trade secrets and business data, affecting competitiveness and regulatory compliance.
Financial Institutions, Retail Businesses, and Healthcare Services: Banks, commercial businesses, and medical facilities rely on digital payment systems, financial networks, and electronic health records. A cyberattack could block access to financial transactions, preventing payroll processing, credit card payments, and A TM withdrawals; compromise confidential customer and patient data, leading to identity theft and regulatory violations; and cause business shutdowns or service disruptions, leading to economic losses and reduced public confidence. For instance, in May 2024, Ascension, a healthcare Local Hazard Mitigation Plan Update
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organization, experienced a ransomware attack that disrupted clinical functions and access to electronic health records, highlighting the potential impact of cyber incidents on healthcare services.
Relationship to Land Use and Development
While cybersecurity risks are not influenced by traditional land use patterns as natural hazards are, the expansion of digital infrastructure, smart city technologies, and industrial automation in Cathedral City has introduced new vulnerabilities that must be considered in urban planning and development.
Mention city’s update of the zoning code that is currently pre-internet.
Industrial Growth and Smart Infrastructure: Cathedral City’s industrial sector is increasingly adopting automated technologies, cloud computing, and Internet of Things (IoT) devices to enhance efficiency and productivity. While these advancements improve operations, they also increase exposure to cyber threats. The city’s Public Works Department offers programs such as the WaterSmart Landscape Grant Program and Smart Irrigation Controller Program, promoting the adoption of smart technologies in residential and commercial landscapes.
Municipal Services and Smart City Initiatives: The City of Cathedral City is incorporating smart technologies into public services, including traffic management, public utilities, and emergency response coordination. While these systems improve efficiency, they also create potential cyber vulnerabilities. The city’s Five-Year Strategic Plan emphasizes the integration of technology to enhance service delivery and operational efficiency, reflecting a commitment to smart city initiatives.
Commercial and Residential IT Vulnerabilities: With expanding broadband access, remote work infrastructure, and digital communication platforms, residents and businesses in Cathedral City
face increased cyber risks from phishing scams, data breaches, and financial fraud. The city’s efforts to improve infrastructure aim to enhance connectivity and accessibility, which, while beneficial, also necessitate robust cybersecurity measures to protect the growing digital landscape.
Magnitude and Severity
To assess the severity of cyberattacks, standardized classification models focus on factors such as the scale of disruption, duration of system outages, data integrity compromise, financial impact, and potential threats to public safety.
Several government agencies and cybersecurity organizations have developed frameworks to categorize cyber incidents based on their impact and response level. Cathedral City can use these classification Local Hazard Mitigation Plan Update
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models to assess and respond to cybersecurity threats that could affect municipal operations, critical infrastructure, and private sector functions.
Cyber Incident Severity Schema (CISA/US -CERT): The Cybersecurity and Infrastructure Security Agency (CISA) and the United States Computer Emergency Readiness Team (US -CERT) use a five - level Cyber Incident Severity Schema to classify cyberattacks based on their impact on national security, public safety, and critical infrastructure:
• Emergency (Level 5): A catastrophic cyberattack causing nationwide or regional infrastructure failures, such as disabling power grids, financial networks, or emergency response systems.
Immediate federal response and emergency actions are required. • Severe (Level 4): A major Cathedral City causing widespread system outages, financial losses, or threats to public safety, such as ransomware shutting down a city’s government network or a cyberattack on water treatment facilities. Federal and state resources are activated. • High (Level 3): A significant cyberattack affecting one or more critical services, such as 911 dispatch, hospital networks, or major business operations, requiring multi-agency coordination to restore affected systems.
• Medium (Level 2): A targeted cyberattack or IT disruption affecting municipal departments, business systems, or industrial networks without immediate threats to public safety. • Low (Level 1): A minor cyber event such as phishing attempts, website defacement, or a localized malware infection with limited operational impact.
Cathedral City’s most severe potential cyber threats include ransomware attacks on city services, data breaches exposing sensitive resident information, and disruptions to power or water infrastructure via cyber intrusions into industrial control systems.
National Institute of Standards and Technology (NIST) Cyber Impact Scale: The National Institute of Standards and Technology (NIST) classifies cyber incidents based on their impact on confidentiality, integrity, and availability of information systems:
• Critical Impact: The attack completely disables essential public services, such as emergency dispatch, law enforcement systems, or critical utilities, leading to immediate risks to life and safety.
• High Impact: The attack compromises sensitive data, disrupts major government or business operations, or causes significant financial harm, requiring prolonged recovery efforts. • Moderate Impact: A cyberattack partially disrupts operations but does not fully compromise critical services, causing delays and operational inefficiencies.
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• Low Impact: The attack is minor and contained, such as a brief website outage or a phishing attempt detected before damage occurs.
Severity of Cyberattacks
Cyber threats vary in severity, ranging from low -impact phishing attempts to high -impact critical infrastructure disruptions. The most significant threats include:
Municipal and Emergency Services Disruptions: A ransomware attack or data breach targeting city government IT systems could disrupt financial transactions, permit processing, emergency services, and law enforcement databases. If 911 dispatch services, police records, or fire department communication networks were compromised, this could lead to delayed response times, compromised public safety, and legal liabilities for the city.
Critical Infrastructure Attacks: If cybercriminals or nation-state actors targeted Cathedral City’s power grid, water treatment facilities, or industrial SCADA (Supervisory Control and Data Acquisition) systems, the resulting outage or contamination event could create a public health emergency. An attack of this nature would require state and federal emergency response coordination to restore essential services.
Business and Industrial Cyber Disruptions: Industrial and logistics facilities often rely on automated control systems and cloud -based logistics operations. A cyberattack on an industrial network could shut down manufacturing production lines, disrupt supply chains, or expose proprietary business data.
This could result in millions of dollars in economic losses and potential job disruptions for local employees.
Widespread Personal Data Breaches: If a data breach exposed personally identifiable information (PII) from municipal databases, financial institutions, or healthcare providers, it could lead to identity theft, financial fraud, and regulatory penalties. A large-scale breach affecting
thousands of residents or businesses could result in long-term legal and reputational consequences for the city and affected organizations.
Transportation and Traffic Management System Disruptions: An attack on Cathedral City’s traffic control systems, transit networks, or freeway communication systems could create major congestion, increase accident risks, and disrupt freight movement through the city. A cyberattack affecting highway sensors, traff ic signals, or public transit payment systems would require urgent mitigation efforts to prevent secondary transportation hazards
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Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Although Cathedral City has not been directly targeted, past cyber incidents in California and across the United States illustrate the types of cyber threats that could impact the city. 2018 City of Atlanta Ransomware Attack: In March 2018, a ransomware attack crippled the City of Atlanta’s IT infrastructure, locking city employees out of email accounts, financial processing systems, and public service databases.
• The attackers demanded approximately $51,000 in Bitcoin, but the total cost of recovery exceeded $17 million due to system restoration, data recovery, and security enhancements. • 911 dispatch systems, municipal court records, and online payment systems were rendered inoperable for weeks.
• This attack demonstrated how a single cyber incident can disrupt government functions and require extensive emergency response measures.
2019 Los Angeles County Phishing Attack: In 2019, Los Angeles County experienced a large -scale phishing attack that compromised email accounts of county employees, including those in the Department of Public Works, Sheriff’s Department, and health services.
• More than 1,000 employees were affected, with attackers gaining access to sensitive county records and resident information.
• The breach exposed social security numbers, financial records, and personal medical data, creating risks of identity theft and fraud.
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2021 Colonial Pipeline Cyberattack: In May 2021, the Colonial Pipeline, which supplies nearly 50% of the East Coast’s fuel, was shut down due to a ransomware attack carried out by criminal hacking group DarkSide.
• The attack disrupted fuel distribution for several days, causing shortages and price spikes across multiple states.
• The attackers gained access through a compromised VPN password, highlighting vulnerabilities in remote access systems used by industrial control networks. 2022 Los Angeles Unified School District Ransomware Attack: In September 2022, the Los Angeles Unified School District (LAUSD) suffered a major ransomware attack that encrypted data across its entire school network, affecting over 600,000 students. • Class schedules, student records, and payroll systems were disrupted, forcing emergency IT restoration efforts.
• The attack targeted a weak point in LAUSD’s cybersecurity protocols, emphasizing the need for multi-layered protection and regular system updates, 2023 U.S. Healthcare Cyberattacks: Healthcare providers, including hospitals and emergency medical networks in California, have been targeted by ransomware groups, causing disruptions to patient care, medical records access, and emergency response coordination. • In February 2023, a cyberattack on a hospital system in Southern California delayed emergency room services and patient admissions.
• In August 2023, a ransomware attack on a major health insurance provider disrupted payment processing and patient scheduling for multiple medical facilities.
FEMA Disaster Declarations Related to Cyberattacks
While cyberattacks do not traditionally trigger standalone FEMA disaster declarations, they are increasingly being incorporated into federal emergency response planning. FEMA recognizes cyber incidents as potential components of broader disaster scenarios, such as coordinated attacks on power grids, financial institutions, or emergency communication networks. • FEMA DR-4569-CA (October 2020 – Wildfires and Public Safety Power Shutoffs): Although this disaster declaration was issued due to wildfires in California, it included
cybersecurity concerns related to the Public Safety Power Shutoff (PSPS) system, which could be targeted by cybercriminals to create artificial outages.
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• Presidential Policy Directive 21 (PPD -21) – Critical Infrastructure Cyber Resilience: This directive, issued in 2013 and expanded in 2021, identifies 16 critical infrastructure sectors, including energy, water, transportation, and communications, that require federal cybersecurity protection.
Probability and Effects of Future Conditions
Overall probability over next five years: Likely.
Cyber threats are a rapidly evolving hazard that poses a significant risk to municipal governments, critical infrastructure, businesses, and residents. As Cathedral City continues to expand its digital infrastructure, adopting smart city technologies, and increasing its reliance on cloud -based services, the city’s vulnerability to cyberattacks is expected to rise. The sophistication of cyber threats, combined with the interconnectivity of IT systems across essential services, presents an escalating challeng e.
Future risks will be further compounded by the intersection of climate-driven disruptions, geopolitical instability, and the continued advancement of cyberattack techniques.
Reports from the Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) highlight that ransomware, phishing, and denial-of-service (DoS) attacks have been responsible for disrupting city services, financial sy stems, and emergency response capabilities at an accelerating pace. Between 2018 and 2023, ransomware incidents against U.S. municipalities doubled, largely due to cybercriminals exploiting vulnerabilities in remote-access software, cloud-based storage, and legacy municipal IT systems. Additionally, the rise of industrial cyberattacks has placed critical infrastructure at heightened risk, particularly as utilities and government services transition toward automation and greater digital integration.
Given these trends and the growing attack surface created by digital modernization, Cathedral City is at a high probability of experiencing a cyberattack affecting municipal operations, emergency services, and critical infrastructure systems.
The frequency and severity of cyberattacks are projected to increase due to several emerging trends.
The expansion of artificial intelligence (AI) in cybercrime will allow threat actors to automate attacks, improve malware evasion techniques, and escalate the volume of cyber intrusions. AI -driven ransomware and social engineering campaigns are expected to become more sophisticated, making detection and prevention more challenging for local governments. At the same time, threats to industrial control systems (ICS) will continue to rise, particularly within water and power utilities that rely on Supervisory Control and Data Acquisition (SCADA) systems. These systems, which are essential for infrastructure automation, present attractive targets for cybercriminals seeking to disrupt essential services.
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The rapid expansion of smart city technologies further increases cyber vulnerabilities. Internet of Things (IoT) devices, used for traffic management, emergency response coordination, and municipal surveillance, create additional entry points for attackers . As interconnected urban infrastructure becomes more commonplace, cyber risks will extend beyond traditional IT networks, directly affecting public safety and urban operations. If a cyberattack were to disable Cathedral City’s IT networks, cascading failures could disrupt power distribution, water treatment systems, and emergency communication channels. The potential for such disruptions reinforces the need for heightened cyber resilience across municipal agencies.
Cyberattacks pose significant financial risks to municipalities, with the cost of ransomware attacks on mid-sized cities averaging over $3.5 million per incident. These costs encompass system restoration, legal expenses, data recovery, and operational downtime. In addition to direct recovery expenses, local governments are facing a sharp rise in cybersecurity insurance premiums, with municipal cyber liability policies increasing by 300% since 2020. The economic implications of prolonged IT disruptions extend beyond city hall, affecting residents and businesses that rely on municipal services. A single cyberattack on a city’s financial system can result in revenue losses ranging from $5 million to $25 million, depending on the extent of downtime, data loss, and service disruption. These escalating costs highlight the urgent need for robust cybersecurity investments to mitigate financial and operational risks.
The intersection of climate change and cybersecurity presents additional challenges for municipal resilience planning. Natural disasters such as wildfires, extreme heat events, and severe storms have been increasingly exploited by cybercriminals, who time attacks to coincide with emergency situations when response capabilities are already strained. The growing reliance on digital emergency management tools, including cloud -based crisis coordination platforms, introduces further vulnerabilities that must be addressed.
Energy grid vulnerabilities also represent a growing concern, as increasing temperatures and extreme weather conditions lead to surging electricity demand. With power distribution networks becoming more digitized, cyber threats targeting grid infrastructur e could result in prolonged blackouts during critical periods. In a worst -case scenario, a cyberattack on a power utility during a climate -driven emergency could significantly delay response efforts, exacerbating the overall impact on public health and safety.
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3.3.9 Infectious disease/pandemic
Description
Infectious diseases and pandemics pose significant risks to public health, economic stability, and societal function. These hazards can spread rapidly, overwhelm healthcare systems, and disrupt essential services. An infectious disease outbreak occurs when a pathogen-such as a virus, bacterium, or fungus-spreads within a community, region, or globally, potentially leading to widespread illness and fatalities.
A pandemic is a large -scale infectious disease outbreak that extends across multiple countries or continents, affecting a significant portion of the global population. Pandemics often arise from novel or highly transmissible pathogens with little to no pre existing immunity, such as influenza viruses, coronaviruses (e.g., SARS -CoV-2), or emerging zoonotic diseases. The World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) define pandemics as global epidemics requiring coordinated international response efforts.
The spread and severity of an infectious disease outbreak depend on its mode of transmission, human behavior, and the effectiveness of public health interventions.
Modes of Transmission: Understanding how a disease spreads is critical for developing mitigation strategies:
• Airborne Transmission – Pathogens spread through respiratory droplets or aerosolized particles (e.g., COVID-19, tuberculosis, measles).
• Direct Contact Transmission – Infection occurs through physical contact with an infected person, contaminated surfaces, or bodily fluids (e.g., Ebola, norovirus, MRSA). • Vector-Borne Transmission – Carriers such as mosquitoes and ticks spread disease (e.g., West Nile virus, Zika virus, Lyme disease).
• Foodborne and Waterborne Transmission – Contaminated food or water supplies contribute to outbreaks (e.g., Salmonella, cholera).
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The interaction of these transmission pathways with climate change and urban development increases the complexity of predicting and mitigating infectious disease risks.
Characteristics of Pandemic -Capable Diseases: Not all infectious diseases result in pandemics.
Pathogens with pandemic potential typically share the following characteristics:
• High transmissibility – The ability to spread efficiently from person to person, often before symptoms appear (e.g., influenza, COVID-19).
• Global impact potential – The capacity to move beyond a single region and affect multiple countries (e.g., H1N1, SARS).
• Limited preexisting immunity – A lack of natural or vaccine -induced immunity within the population, increasing infection susceptibility (e.g., novel coronaviruses, emerging zoonotic diseases).
• Severe healthcare strain – A high rate of infections overwhelming hospitals, leading to resource shortages and increased mortality.
Location and Geographic Extent
Infectious diseases and pandemics differ from natural hazards in that they do not adhere to physical geographic boundaries. Instead, their spread is influenced by human mobility, population density, infrastructure resilience, and the effectiveness of conta inment measures. The geographic extent of an outbreak can range from localized clusters to global pandemics, with transmission pathways dictated by factors such as travel patterns, workplace interactions, and healthcare access.
Cathedral City does not possess unique geographic attributes that inherently increase the likelihood of infectious disease outbreaks. However, as a city with a diverse economy encompassing industrial, commercial, and service sectors, its connectivity to ma jor transportation corridors and reliance on a commuter labor force elevate the potential for disease spread. The city’s economic and social integration with the broader Riverside County region necessitates a preparedness framework that accounts for emerging infectious disease threats and pandemic response capabilities.
Several factors may influence the likelihood and severity of disease transmission in specific areas:
Industrial and Commercial Zones: Cathedral City’s economy includes manufacturing, logistics, and industrial operations, which often require employees to work in enclosed spaces for prolonged periods.
This increases the risk of airborne disease transmission, particularly for respiratory p athogens such as influenza and COVID-19. Facilities such as warehouses, food processing plants, and transportation hubs further elevate transmission potential due to shared equipment, high worker turnover, and frequent Local Hazard Mitigation Plan Update
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physical interactions. During the COVID -19 pandemic, outbreaks in similar settings nationwide underscored the need for enhanced workplace health and safety protocols, including ventilation improvements and flexible sick leave policies.
High-Traffic Transportation Corridors: Cathedral City’s location along major transportation routes, including Interstate 10 and U.S. Route 111, facilitates high -volume movement of goods and people.
The presence of freight rail lines further integrates the city into regional and national supply chains.
These transportation networks can accelerate the spread of infectious diseases
by facilitating close contact among travelers, workers, and freight operators. Public transit users, particularly those relying on buses and ride -sharing services, are also at heightened exposure risk, especially during peak travel hours.
Healthcare Facilities and Long -Term Care Centers : Cathedral City is home to healthcare facilities, assisted living centers, and skilled nursing homes that serve elderly residents and individuals with chronic health conditions. These populations face heightened risks from infectious diseases due to weakened immune systems and frequent medical interactions. Historical data from past pandemics, including COVID -19 and influenza outbreaks, demonstrate that long -term care facilities are particularly susceptible t o rapid disease spread. Effective infection control measures, such as vaccination programs, personal protective equipment (PPE) distribution, and emergency staffing plans, are essential for mitigating risks in these environments.
Schools and Childcare Facilities: Educational institutions, including schools, daycare centers, and after- school programs, serve as focal points for community interaction and can amplify disease transmission.
Children, particularly those in elementary schools, are more susceptible to contr acting and spreading infectious diseases such as influenza, measles, and gastrointestinal viruses due to frequent close contact and underdeveloped immune responses. High absenteeism rates during pandemics can disrupt education and burden working families, while school closures-as seen during the COVID-19 pandemic- can have cascading socioeconomic effects.
Public Gathering Spaces and Retail Centers: Cathedral City contains numerous retail establishments, dining venues, fitness centers, and entertainment spaces that serve as community hubs. Crowded environments, especially during peak hours and special events, increase the likelihood of airborne and surface-contact disease transmission. Large -scale public events, religious services, and recreational activities also present potential exposure risks.
Magnitude and Severity
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Infectious disease outbreaks and pandemics pose significant risks to public health, the economy, and societal stability. The severity of an outbreak is determined by multiple factors, including the pathogen's transmissibility, morbidity and mortality rates, impact on healthcare systems, and economic disruption. Unlike natural hazards with standardized intensity scales, infectious disease severity is assessed using epidemiological and clinical metrics, such as the basic reproduction number (R ₀), case fatality rate (CFR), and excess mortality.
Pandemic classification and response levels are guided by international and national health agencies, including the World Health Organization (WHO), the Centers for Disease Control and Prevention (CDC), and state and local public health departments. The impact of a pandemic also
depends on the availability and effectiveness of medical countermeasures, including vaccines, antiviral treatments, and healthcare surge capacity. Pandemic severity is evaluated using epidemiological models, hospital capacity assessments, and economic impact studies. The following frameworks provide a structured approach to measuring and understanding pandemic severity:
• Basic Reproduction Number (R ₀): The Basic Reproduction Number (R ₀) is a fundamental metric indicating the average number of secondary infections caused by a single infected individual in a fully susceptible population. Higher R ₀ values correlate with greater transmission potential, necessitating stronger mitigation measures such as vaccination, social distancing, and quarantine protocols.
• R₀ < 1 – The disease is expected to decline over time. • R₀ = 1 – The disease maintains a steady presence without significant outbreaks. • R₀ > 1 – The disease spreads exponentially, increasing the risk of a pandemic.
Past pandemics have exhibited different R ₀ values, influencing their severity and response measures:
• Seasonal Influenza: R₀ ≈ 1.3
• COVID-19 (original strain): R₀ ≈ 2.5
• Measles: R₀ ≈ 12–18 (one of the most highly contagious diseases known) • Case Fatality Rate (CFR): CFR measures the proportion of deaths among confirmed cases and is a key indicator of pandemic severity. Higher CFR values indicate greater strain on public health infrastructure and higher mortality risk:
• Low-Severity Disease (CFR < 0.1%) – Includes common seasonal influenza strains. • Moderate-Severity Disease (CFR 0.1% – 5%) – Includes pandemic influenza (H1N1) and certain COVID-19 strains.
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• High-Severity Disease (CFR > 10%) – Includes Ebola (CFR ~50%), SARS (CFR ~11%), and MERS (CFR ~34%).
• Hospitalization and Healthcare System Strain: A pandemic’s severity is also measured by the burden it places on healthcare systems. High hospitalization rates can overwhelm medical facilities, necessitating emergency expansion measures and surge staffing. Metrics include:
• Hospitalization Rate – Percentage of infected individuals requiring hospital care. • ICU Admission Rate – Proportion of hospitalized patients requiring intensive medical intervention.
• Bed Occupancy Rate – Percentage of available hospital beds occupied by pandemic patients.
• Pandemic Severity Assessment Framework (PSAF): The CDC’s Pandemic Severity Assessment Framework (PSAF) categorizes pandemics based on transmissibility and clinical severity:
• Category 1 (Mild Pandemic): CFR < 0.1% (e.g., seasonal flu). • Category 2 –3 (Moderate Pandemic): CFR between 0.1% and 1.0% (e.g., 2009 H1N1 pandemic).
• Category 4 –5 (Severe Pandemic): CFR > 1.0% (e.g., 1918 Influenza Pandemic, early COVID-19 waves).
Severity of Potential Infectious Disease Outbreaks
The impact of an infectious disease outbreak in Cathedral City would depend on multiple factors, including public health response capacity, local healthcare infrastructure, and workforce resilience.
Cathedral City, located in the Coachella Valley, has a diverse economy with significant employment in sectors such as retail, food services, and personal care. During the COVID -19 pandemic, the Coachella Valley experienced substantial job losses, with proj ections indicating a decline of 28.7% in employment from December 2019 to May 2020. Sectors like sales, food preparation, and personal care were among the most affected, leading to high absenteeism and supply chain disruptions. This underscores the need for enhanced workplace safety policies, including personal protective equipment (PPE), remote work accommodations, and staggered shifts.
The Coachella Valley’s healthcare infrastructure comprises three general acute care hospitals:
Eisenhower Health, Desert Regional Medical Center, and John F. Kennedy Memorial Hospital, collectively offering 1,006 licensed beds. However, 86% of these beds a re located in the western part of the valley, potentially limiting access for residents in other areas. During high -severity pandemics, this distribution may lead to ICU bed shortages, increased emergency department congestion, and supply chain challenges for critical medical equipment, including ventilators and PPE.
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Certain populations within Cathedral City face heightened risks due to age, preexisting health conditions, or economic status. The Coachella Valley has communities with significant disparities between rich and poor, with poverty heavily concentrated in geo graphically isolated areas. These communities often exhibit lower rates of medical coverage, and residents may face barriers to healthcare access, increasing disease spread. Additionally, long -term care and assisted living facilities require stringent infection control measures to protect vulnerable individuals.
Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date Declaration Title State
Biological Riverside
County DR-4482-CA 2020 March 3/22/2020 COVID-19
PANDEMIC CA
Flood-related declared disasters in the vicinity of the Coachella Valley, 1953-2024. Source: FEMA California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
March 2020 COVID-19 All 58 counties (including Riverside County) List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Throughout history, infectious disease outbreaks and pandemics have profoundly impacted public health, economies, and societies. While Cathedral City has not been the epicenter of a pandemic, it has been affected by regional, national, and global infectious disease events. These outbreaks have shaped public health policies, emergency response planning, and business continuity strategies in the area.
The 1918 Influenza Pandemic, commonly known as the "Spanish Flu," was one of the deadliest global disease outbreaks, infecting approximately one -third of the world’s population and causing an estimated 50 million deaths worldwide. During this period, Riverside County, where Cathedral City is located, experienced significant morbidity and mortality. Local governments implemented quarantine measures, business closures, and mask mandates to curb the spread of the virus. The pandemic's impact on the local workforce, including agricultural and service industries, led to economic disruptions and highlighted the need for improved public health infrastructure.
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The 1957–1958 Influenza Pandemic, known as the "Asian Flu," resulted in an estimated 1 –2 million deaths worldwide and caused severe economic disruptions due to workforce absenteeism. California's healthcare system was heavily burdened, prompting public hea lth authorities to implement vaccination programs. Communities in Riverside County, including Cathedral City, experienced increased healthcare demands and workforce shortages, underscoring the importance of vaccination and public health preparedness.
The 2009 H1N1 Influenza Pandemic, referred to as the "Swine Flu," caused an estimated 274,000 hospitalizations and 12,500 deaths in the United States. Riverside County reported numerous confirmed cases, leading to school closures, vaccination campaigns, and emergency health
declarations. The Federal Emergency Management Agency (FEMA) provided funding to local governments for pandemic response, including testing, treatment, and public education efforts. In Cathedral City, schools and businesses faced operational disruptions du e to workforce absences and public health restrictions, emphasizing the need for effective communication and continuity planning.
During the 2014–2016 West Africa Ebola Outbreak, while the Ebola virus did not spread widely in the United States, Riverside County health officials implemented emergency response protocols due to the risk of imported cases. Local hospitals and emergency services conducted Ebola preparedness drills and enhanced biosecurity protocols. Emergency medical and public health personnel in Cathedral City participated in regional coordination efforts to enhance infectious disease containment procedures, reflecting the city’s commitment to global health security.
The 2019 –2023 COVID -19 Pandemic was the most significant infectious disease event affecting Cathedral City in modern history. Riverside County experienced over 5,000 fatalities, with Cathedral City reporting a substantial number of cases. Business closures, workforce disruptions, and supply chain delays affected various sectors, including tourism, retail, and healthcare. School closures and transitions to remote learning impacted students, educators, and working parents. Mass vaccination campaigns were laun ched across Riverside County, including sites in Cathedral City, to ensure vaccine accessibility for residents and essential workers. The pandemic highlighted the city’s resilience and the critical role of community cooperation in public health initiatives.
In 2022, Riverside County declared a public health emergency in response to the global monkeypox (Mpox) outbreak. The outbreak was contained through targeted vaccination efforts and public health education campaigns. Cathedral City collaborated with county health officials to provide resources and information to residents, demonstrating the importance of proactive public health measures in managing emerging infectious diseases.
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FEMA issues disaster declarations for pandemics when they cause widespread infrastructure strain, economic damage, or require large-scale federal assistance. Cathedral City has benefited from federal emergency support during national and statewide pandemic responses.
During the COVID-19 Pandemic (FEMA DR-4482, March 2020 – Ongoing), federal assistance provided funding for emergency medical response, personal protective equipment (PPE) distribution, and economic relief programs in California. Riverside County, including Cathedral City, received support for vaccination sites, hospital resources, and small business assistance. This remains one of the most extensive public health emergency responses in FEMA history, underscoring the collaborative efforts between federal, state, and local agencies in addressing public health crises.
During the 2009–2010 H1N1 Influenza Pandemic, federal assistance helped provide flu vaccines, public health messaging, and antiviral medication stockpiles for state and local governments. Healthcare providers in Cathedral City benefited from county-level allocations of medical resources, highlighting the importance of federal support in enhancing local public health capacities during infectious disease outbreaks.
Probability and Effects of Future Conditions
Overall probability over next five years: Unlikely.
Public health agencies, including the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), and the Riverside County Department of Public Health, utilize predictive modeling to assess disease transmission patterns and outbr eak probabilities. These models integrate factors such as pathogen characteristics, environmental influences, and human movement patterns to estimate the likelihood of future pandemics and emerging infectious diseases.
The WHO and CDC have identified an increasing emergence of novel infectious diseases, with approximately 75% being zoonotic -transmitted from animals to humans. The probability of another pandemic occurring within the next few decades is considered high, wi th respiratory viruses, such as influenza and coronaviruses, being the most probable causative agents. Additionally, climate change is altering disease transmission patterns by expanding the reach of vector-borne illnesses like West Nile virus into regions such as Southern California. Cathedral City must incorporate these projections into emergency response planning, addressing both airborne diseases and the growing threat of vector - borne diseases driven by rising temperatures.
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different population groups. In communities like Cathedral City, several key factors influence transmission dynamics. Workplace transmission risks are significant in sectors where employees work in enclosed spaces with shared equipment, increasing the pote ntial for disease spread. The city’s proximity to major transportation corridors connects Cathedral City to higher -density urban centers, which could accelerate disease transmission during an outbreak. Population movement patterns, including gatherings in schools, long -term care facilities, and retail centers, also play a role in determining the likelihood and severity of an outbreak.
The impact of a future pandemic will also depend on the strain placed on the healthcare system and the capacity for medical response. During the COVID -19 pandemic, hospitals in Riverside County, serving Cathedral City, experienced severe strain, with ICU o ccupancy rates exceeding 90% during peak periods. Future pandemics with high hospitalization rates could similarly
overwhelm emergency medical services and necessitate the expansion of surge capacity at regional hospitals.
Although the exact timing of future pandemics cannot be predicted, global epidemiological trends indicate that severe infectious disease outbreaks are likely to occur more frequently due to increased international travel, environmental changes, and microbial evolution. Historical patterns suggest that large-scale pandemics have occurred approximately every 30 to 50 years, but modern factors, such as increased human-animal interactions and climate change, may accelerate this timeline. The CDC and WHO have id entified multiple viral families, including coronaviruses, influenza viruses, and paramyxoviruses, with pandemic potential. Riverside County’s role as a transportation hub increases the likelihood of early exposure to emerging diseases, which could affect Cathedral City before containment measures are widely implemented. In response, Cathedral City must maintain an adaptive public health framework that allows for rapid adjustments to emerging disease threats and changing transmission patterns.
Future pandemics could vary widely in severity. Some may cause widespread illness with low mortality rates, similar to the 2009 H1N1 influenza pandemic, while others could result in high fatality rates and healthcare system breakdowns, resembling the early waves of COVID-19 or historical outbreaks such as the 1918 influenza pandemic. Models suggest that a pandemic with a case fatality rate (CFR) between 1% and 3% could lead to significant social and economic disruptions, while a CFR exceeding 5% could trigger global instability. Additional concerns, such as antibiotic resistance and novel pathogen evolution, could further increase the severity of future outbreaks and complicate containment efforts.
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Climate change is expected to play a growing role in the emergence and spread of infectious diseases.
Rising temperatures and shifting precipitation patterns are expanding the range of vector -borne diseases, such as West Nile virus, into new geographic are as. Urban heat islands, including areas in Cathedral City, may create microenvironments conducive to increased mosquito breeding and disease transmission. Additionally, worsening air pollution and wildfire smoke-both becoming more frequent in California-can exacerbate respiratory infections and make populations more vulnerable to airborne diseases.
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3.3.10 Landslides
Description
Landslides are the downslope movement of rock, soil, or debris due to gravity, often triggered by factors such as seismic activity, heavy rainfall, or human -induced alterations to the landscape. In Cathedral City, landslide hazards are primarily associated with seismically induced slope instability, rockfalls, and debris flows, particularly in areas of steep terrain such as the Santa Rosa Mountains and the Indio Hills.
Landslides present a significant hazard to transportation infrastructure, buildings, and utilities, particularly where development has expanded into areas of high susceptibility. The effects of landslides can be exacerbated by earthquakes, heavy precipitation, and wildfires, which reduce soil cohesion and increase runoff.
Local Susceptibility and Risk Factors : Cathedral City is situated in a geologically active region, with fault lines capable of generating strong ground shaking. Seismically induced slope instability is a particular concern in the steep slopes of the Santa Rosa Mountains and the Indio Hills, where fractured bedrock and loose sediments make these areas prone to landslides. The 2040 Cathedral City General Plan identifies a moderate to high potential for seismically induced rockfalls and landslides, particularly where steep slopes exist adjacent to developed areas.
The East and West Cathedral Canyon Washes provide some level of protection against slope instability by acting as natural buffers between the mountains and urbanized areas. However, areas at the base of slopes remain vulnerable to rockfalls and debris flow s, especially during periods of intense rainfall or seismic activity.
Soils in the region vary in their susceptibility to slope failure. Loose, unconsolidated sediments, such as those found on alluvial fans, may experience movement due to liquefaction or erosion. In contrast, fractured bedrock in the Santa Rosa Mountains can fail along existing planes of weakness, particularly when subjected to ground shaking or weathering processes.
Seismically Induced Landslides : Strong earthquakes can trigger landslides in steeply sloped areas by causing rapid ground shaking that reduces soil cohesion and destabilizes slopes. A peak ground acceleration of 0.10g or greater is typically required to induce earthquake-related slope failures. Given that the region is located near active faults, including the San Andreas Fault and the San Jacinto Fault, Cathedral City is at risk of experiencing seismically induced landslides in areas with vulnerable topography.
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Intense shaking can also lead to rockfalls, particularly on steep ridges such as Edom Hill. Rockfalls occur when weathered or fractured rock becomes dislodged and falls due to the force of gravity. Areas with high concentrations of boulders or loose rock are especially at risk.
Rainfall-Induced Landslides and Debris Flows : Heavy precipitation can saturate soils, reducing their cohesion and leading to slope failure. This is particularly concerning in post -wildfire environments, where vegetation loss increases the potential for soil erosion and runoff. Burned areas can become sources of debris flows, in which fast-moving mixtures of water, soil, and rock travel downslope with destructive force.
Climate change projections suggest that extreme rainfall events may become more frequent in California, increasing the likelihood of rain-triggered landslides in Cathedral City. Areas with loose or poorly compacted soils are especially vulnerable during intense storm events Location and Geographic Extent
Landslides in Cathedral City are primarily associated with the slopes of the Santa Rosa Mountains and the Indio Hills, which exhibit moderate to high susceptibility to rockfalls and slope failures due to their geologic composition and steep inclines . The metasedimentary and intrusive rocks in these regions contain planes of weakness, including fractures, joints, and foliation, which contribute to instability, particularly during seismic events or intense rainfall.
The areas most at risk for landslides are those adjacent to steep slopes, where rockfalls and debris flows could impact developed and undeveloped lands. The highest -risk locations include the eastern and northeastern slopes of the Santa Rosa Mountains and sections of the Indio Hills, where weathering processes create precariously perched boulders susceptible to failure. The East and West Cathedral Canyon Washes act as natural buffers, helping to mitigate the effects of slope instability by absorbing falling debris and providing some protection to habitable structures.
Earthquake-induced slope failures are a significant concern due to the proximity of active faults, including the San Andreas Fault and the San Jacinto Fault. Seismically induced landslides are most likely to occur in areas experiencing peak ground accelerations above 0.10g, which is within the range of seismic activity projected for Cathedral City . Additionally, engineered slopes and cut -and-fill constructions on the valley floor may also be vulnerable if not designed to withstand seismic shaking.
Magnitude and Severity
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The magnitude of a landslide’s impact depends on its size, location, and the proximity of vulnerable structures or infrastructure. In Cathedral City, areas at the base of steep slopes -
Source: California Geological Survey Map Sheet 58: Deep-Seated Landslide Susceptibility
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particularly along the edges of the Santa Rosa Mountains and Indio Hills - are susceptible to rockfall and debris flow hazards. These hazards pose risks to roadways, utility lines, and the Cove neighborhood, where residential development lies near the base of unstable slopes. The
East and West Cathedral Canyon Washes function as natural drainage channels and can absorb limited debris from slope failures, offering partial protection to adjacent areas during moderate events.
The Santa Rosa Mountains and Indio Hills contain zones with moderate to high landslide susceptibility, particularly where fractured or jointed bedrock is exposed. The severity of slope failure events in Cathedral City is influenced by both natural and human-induced factors, including earthquake ground shaking, intense or prolonged rainfall, and grading or construction on unstable terrain.
Seismically induced landslides and rockfalls are a key concern given the city’s proximity to multiple active faults. The San Andreas Fault, which runs near the Coachella Valley, is capable of producing earthquakes in excess of magnitude 7.0, with peak horizontal ground accelerations (PGA) in Cathedral City ranging from 0.45g to 0.9g, according to USGS models. Ground shaking at these levels could dislodge unconsolidated slope materials and fractured rock in the Santa Rosa foothills and nearby ridgelines. Add itionally, areas underlain by unconsolidated alluvial deposits may be subject to seismically induced ground failure, including settlement or lateral spreading.
Rainfall-triggered landslides are also a concern, particularly during extreme precipitation events such as atmospheric rivers or tropical storms. Although Cathedral City experiences relatively low annual rainfall due to its arid Sonoran Desert climate, high-intensity storms can saturate loose soils, especially on unvegetated or recently disturbed slopes. This can increase the probability of debris flows or shallow landslides.
Of growing significance is the risk of mudflow and debris transport from burned areas outside Cathedral City. During Tropical Storm Hilary in August 2023, significant volumes of sediment, rocks, and mud were transported from burn scars in the Santa Rosa Mo untains, more than 25 miles away.
These debris flows overwhelmed regional drainage infrastructure, causing road closures and sediment deposition in downstream areas. Although Cathedral City was not within the burn area, the city received mud and sediment f rom upstream flows, highlighting the need to address post -wildfire hydrologic and geomorphic impacts in slope hazard mitigation. These transboundary flow risks are projected to increase under climate-driven changes to wildfire frequency and storm intensity.
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Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization While there are no records of large catastrophic landslides directly within Cathedral City’s developed areas, documented incidents of rockfalls and slope instability have occurred following seismic events, particularly along highways adjacent to steep terr ain. The escarpment along East Palm Canyon Drive has been identified as a hazard area, where falling rock during earthquakes has posed a threat to motorists and infrastructure. Historically, intense seismic events in the broader Coachella Valley region have resulted in localized landslides and rockfalls, with several faults in the area capable of generating peak ground accelerations sufficient to trigger slope failures. Given these conditions, Cathedral City has been assessed as having a moderate to high potential for seismically induced landslides, particularly in undeveloped lands near the Santa Rosa Mountains and on steep ridges such as Edom Hill, where past seismic activity has led to recurrent rockfall hazards.
Probability and Effects of Future Conditions
Overall probability over next five years: Moderate.
The probability of future landslides in Cathedral City is influenced by a combination of natural and human-induced factors, including seismic activity, extreme precipitation events, and slope instability.
While the city is primarily located on relatively flat desert terrain, certain areas, particularly near the Santa Rosa Mountains and Indio Hills, have a moderate to high susceptibility to landslides, especially during seismic events or following heavy rainfall.
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Seismically induced landslides are a significant concern due to Cathedral City’s proximity to multiple active fault zones, including the San Andreas Fault and the San Jacinto Fault. Ground accelerations of at least 0.10g in steep terrain can trigger slope failures, rockfalls, and debris slides. Studies have shown that certain segments of the Santa Rosa Mountains contain highly
fractured or jointed bedrock, making them prone to rockfalls, particularly during strong ground shaking.
Climate change is also expected to influence landslide probability in Cathedral City. While the region has an arid climate with minimal annual rainfall, the increasing intensity of atmospheric river events could lead to higher precipitation levels in short periods, increasing soil saturation and the risk of debris flows. Periods of extreme drought followed by heavy rain can destabilize slopes, further heightening landslide risks. Additionally, wildfires, which are becoming more frequent and severe in Southe rn California, contribute to slope instability by reducing vegetative cover that helps hold soil in place.
Future development and land use changes in hillside areas near the Santa Rosa Mountains may further increase susceptibility to landslides if appropriate geotechnical assessments and mitigation measures are not implemented. Engineering solutions such as slope reinforcement, proper drainage systems, and vegetation management can help reduce landslide risks in vulnerable areas. However, as development expands into terrain with moderate to high susceptibility to landslides, continuous monitoring and adherence to updated building codes will be necessary to mitigate potential impacts.
The potential effects of future landslides include damage to infrastructure, road closures, and disruptions to essential services. Areas near the foothills of the Santa Rosa Mountains and Indio Hills, as well as sections of Highway 111 and other roadways a djacent to unstable slopes, may experience periodic closures due to rockfalls or debris flows. Landslides in these areas could also impact utilities, including water and power lines, further exacerbating the consequences of such events.
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3.3.11 Sandstorms
Description
Sandstorms in Cathedral City are characterized by strong wind events that lift and carry large amounts of fine dust, sand, and particulate matter across roadways, open land, and developed areas. These events include haboobs-fast-moving walls of dust triggered by downdrafts from collapsing thunderstorms-and persistent blowsand conditions, which occur when dry, loose sand is mobilized by high sustained winds, often from the northwest.
Blowsand is a chronic hazard in the Coachella Valley, particularly along roadways such as Interstate 10, Varner Road, Gene Autry Trail, and Vista Chino, where wind -driven sand can accumulate on pavement, obscure visibility, and cause significant disruption s to transportation, public safety, and health. Unlike haboobs, which are rapid -onset events associated with summer monsoons, blowsand typically occurs under sustained wind conditions from November through May and may persist for hours or even days.
Fine particulate matter (PM10 and PM2.5) carried in sandstorms poses serious health risks, especially to individuals with asthma, chronic respiratory disease, cardiovascular illness, or other pre -existing health conditions. In Cathedral City, this hazard i ntersects with regional air quality concerns, which already place the city in non-attainment status under federal clean air standards due to desert dust and transported pollution.
While sandstorms rarely cause direct structural damage, they frequently lead to traffic accidents, road closures, vehicle damage, and utility disruptions, particularly along power lines and substations exposed to high dust loads. Recurrent sand accumulatio n also increases roadway maintenance costs and decreases visibility for both emergency and commercial traffic, presenting operational hazards for first responders and freight carriers.
Location and Geographic Extent
Sandstorms in Cathedral City primarily affect areas with exposed sandy soils, minimal vegetation cover, and direct alignment with prevailing northwesterly winds. These events are most common in the northern and eastern portions of the city, particularly ad jacent to major wind corridors and desert washes.
The most affected locations include:
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• Varner Road and Interstate 10 Corridor: High vulnerability zone for both visibility -related vehicle collisions and sand deposition across roadways. Wind-driven sediment often originates from open land west of Palm Drive and north of Vista Chino.
• Whitewater River Channel: Functions as a conduit for wind-driven sand transport, particularly where the channel intersects with infrastructure east of Date Palm Drive and near Cathedral Canyon Drive.
• North Cathedral City Open Spaces: Undeveloped or sparsely vegetated parcels between Mountain View Road, Rio Vista Elementary School, and the Desert Princess Golf Course frequently experience localized sand deposition.
• Edom Hill Area: Located on the city’s northern boundary, this area is prone to both wind erosion and terrain -amplified gusts, making it a significant origin point for episodic sand transport during high-wind events.
Winds in the Coachella Valley frequently exceed 25 –35 mph, with gusts over 50 mph recorded at nearby weather stations (e.g., Palm Springs International Airport and CVAG’s Indio wind monitor).
Sandstorms typically develop during Santa Ana wind conditions or during cold frontal passages when desert wind gradients intensify.
Relationship to Land Use and Development
Blowsand hazards are closely tied to land use decisions and the amount of disturbed or unprotected soil in urban fringe areas. In Cathedral City, the expansion of urban development along the city’s north and east periphery -particularly in the Panorama, nor th of Vista Chino, and Varner Road areas -has increased exposure to sand-laden winds from open space and alluvial fan terrain.
Unpaved lots, vacant parcels, and transitional areas between development and desert terrain act as source zones for fine particulate matter. These are especially vulnerable during construction activity, grading, or utility trenching. Developments adjacent to the Whitewater River floodplain and historic wind-transport corridors are particularly at risk for both sand deposition and chronic dust accumulation.
The Coachella Valley Association of Governments (CVAG) has emphasized in its Blowsand and Flood Risk Study (2021) that unmanaged edge conditions between urban and undeveloped land magnify sand transport. Vegetation removal, compacted soils, and altered dra inage patterns further contribute to sediment mobilization during high-wind events.
Future development, if not properly mitigated through design and site planning, may increase long - term exposure. Cathedral City’s zoning code and future updates to its General Plan should consider Local Hazard Mitigation Plan Update
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incorporating blowsand risk overlays, windbreak design standards, and construction -phase stabilization requirements (e.g., mulch, temporary barriers, and native vegetation buffers) to minimize downstream impacts on road safety, air quality, and infrastructure maintenance.
Magnitude and Severity
Sandstorms in Cathedral City vary in intensity, with severity primarily determined by wind speed, duration, soil particle concentration, and visibility reduction. The most disruptive sandstorm events typically occur when wind gusts exceed 40 –50 mph and sur face soil conditions are dry and unconsolidated. These conditions frequently occur during Santa Ana wind events in the fall and early winter, and during frontal passages in the spring.
The severity of impacts is concentrated in three domains:
• Transportation Safety: Sand deposition across major arterials such as Varner Road, Date Palm Drive, and Interstate 10 can reduce visibility to less than ¼ mile, qualifying as a visibility - obstructing sandstorm under the National Weather Service definition. These events increase the risk of multi -vehicle accidents and can result in highway closures. According to Caltrans and CHP incident logs, sand-related closures have occurred multiple times in the Varner/I-10 corridor in recent years.
• Public Health: Fine particulate matter (PM ₁₀ and PM ₂.₅) carried by sandstorms poses respiratory risks, especially for individuals with asthma, chronic obstructive pulmonary disease (COPD), or cardiovascular conditions. The South Coast Air Quality Management District (SCAQMD) frequently issues Windblown Dust Advisories in the Coachella Valley during severe wind events. Blowsand can trigger local AQI (Air Quality Index) levels to exceed 150 (Unhealthy), particularly in downwind areas such as Cathedral City's Panorama and Cove Districts.
• Infrastructure Impacts: Accumulation of sand in gutters, storm drains, HVAC systems, and solar panel surfaces can degrade performance and increase maintenance costs. Repetitive sand incursion events have prompted the city’s Public Works Department to develop rapid response sand removal protocols along critical corridors and near stormwater intakes.
The severity of individual sandstorm events can be quantified using proxies such as:
• Wind Speed (mph): Events with sustained speeds above 25 mph and gusts over 40 mph are typically associated with sand transport.
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• Particulate Concentration: PM₁₀ levels exceeding 150 µg/m³ over 24 hours, as measured by SCAQMD air monitoring stations, indicate significant health hazards. • Visibility Reduction (miles): Visibility below 0.5 miles over a sustained period triggers National Weather Service advisories for blowing dust or sand.
In extreme cases, sandstorm events may be classified by the National Weather Service as “Haboobs”, involving rapidly advancing walls of dust that reduce visibility to near zero in minutes.
While less common than in Arizona, haboob -like conditions have been recorded in the Coachella Valley-most notably during a July 2018 wind event that generated sustained winds of 60 mph and closed segments of I-10.
Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Cathedral City and the surrounding Coachella Valley have experienced multiple sandstorm and blowsand events over the past two decades. While not typically recorded as federally declared disasters, these events have resulted in road closures, air quality ad visories, traffic accidents, and localized infrastructure impacts. Key historical incidents include:
• July 9, 2018 – Coachella Valley Sandstorm Event: A sudden wind event with gusts exceeding 60 mph resulted in a fast -moving wall of sand and dust sweeping through Cathedral City, reducing visibility to less than ¼ mile. The event prompted closure of eastbound I-10 between Gene Autry Trail and Date Palm Drive. Local police and fire units responded to multiple traffic collisions and stalled vehicles due to zero -visibility conditions. Air quality levels measured at the Palm Springs monitoring station exceeded 170 AQI (Unhealthy) for PM₁₀.
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• March 6–7, 2017 – Spring Wind Event: Prolonged high winds generated widespread blowsand along Varner Road, impacting traffic circulation and temporarily halting SunLine Transit services along key routes. The Public Works Department initiated emergency sand clearance operations to maintain arterial function.
• October 13, 2014 – Santa Ana Wind Event: Sustained winds of 30–40 mph, with gusts exceeding 50 mph, transported large volumes of sand from unpaved areas east of Cathedral City. Blowsand accumulation was recorded on streets in the Dream Homes and Rio Vista neighborhoods. This event was associated with multiple power outages and temporary school closures due to indoor air quality concerns.
• April 21, 2010 – Dust and Blowsand Advisory: The National Weather Service (NWS) issued a regional Blowing Dust Advisory for Riverside County. Winds exceeding 45 mph
created sand drifts on I -10 and SR -111, prompting Caltrans to deploy road crews for sand removal and traffic management. PM ₁₀ concentrations exceeded 200 µg/m³ at local air monitoring stations.
• Annual Recurrence Patterns : Based on historical weather data from the Western Regional Climate Center and Caltrans maintenance logs, sandstorm or blowsand events occur 3–6 times per year, with higher frequency in spring (March–May) and fall (September–November). These events typica lly align with Santa Ana wind patterns or pre -frontal passage conditions that accelerate wind flow through the San Gorgonio Pass.
Cathedral City’s location east of open desert terrain and near active wind corridors such as Varner Road and the Whitewater River channel contributes to elevated exposure. Unpaved lots, agricultural lands, and disturbed development sites within and near city boundaries continue to serve as origin points for sediment mobilization during these wind events.
Probability and Effects of Future Conditions
Overall probability over next five years: Likely.
The probability of future sandstorm events, including both large-scale haboobs and localized blowsand episodes, in Cathedral City is classified as “Likely”, consistent with FEMA’s frequency definition of events that are expected to occur at least once ever y three years. Based on historical climate records, wind speed trends, and recent NWS advisories, Cathedral City experiences 3 –6 significant sand transport events annually, particularly along known high -risk corridors such as Varner Road, Date Palm Drive, and the Whitewater River wash.
Climatic Trends and Drivers: Projected increases in drought severity, declining soil moisture, and longer dry seasons in Southern California -linked to regional climate change -are expected to Local Hazard Mitigation Plan Update
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exacerbate conditions conducive to sand and dust transport. The Fourth California Climate Change Assessment (Inland Deserts Region) identifies increasing wind-driven particulate events in the Coachella Valley due to the following compounding factors:
• Increased frequency and duration of high-wind events during transitional seasons (spring and fall).
• Expansion of exposed soils due to prolonged drought, fallow agricultural fields, and post - wildfire burn scars.
• Land use change and disturbance from new development and deferred dust control on vacant parcels.
Modeling from the South Coast Air Quality Management District (SCAQMD) indicates that PM ₁₀ levels in Riverside County’s desert areas may exceed federal thresholds more frequently under mid - and high-emissions scenarios by 2045, especially during Santa Ana wind conditions.
Future Exposure and Development Patterns : As Cathedral City continues to develop vacant or underutilized land on its eastern edge -especially near the Varner Road corridor, Whitewater Channel, and Edom Hill foothills-construction activity and land disturbance are likely to temporarily increase local susceptibility to sand entrainment and migration. Without adequate stabilization measures, such as revegetation or dust suppression controls, these areas may contribute to more frequent or severe blowsand events.
Additionally, future climate and land-use changes may result in:
• More frequent road closures due to sand accumulation on key arterials (especially I-10, Varner Road, and 30th Avenue).
• Elevated public health impacts from prolonged PM₁₀ exposure, particularly among vulnerable populations with pre-existing respiratory conditions.
• Increased infrastructure maintenance costs for sand removal, street sweeping, and HVAC filtration system replacements at public facilities.
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3.3.12 Transportation-Related Disruptions
Description
Cathedral City faces a variety of transportation-related disruption risks tied to the limited redundancy of its roadway network, regional dependence on Interstate 10 (I-10), proximity to high-frequency rail traffic, and proximity to air corridors and operations associated with Palm Springs International Airport (PSP). Disruptions to transportation systems-whether caused by flood, earthquake, mudflow, accidents, mechanical failure, or cascading hazards such as wildfire or sandstorms -can significantly impact emergency response, resident mobility, goods movement, and regional economic continuity.
The city is bisected and bounded by several critical corridors, including I-10, State Route 111 (SR-111), Date Palm Drive, Gene Autry Trail, and Dinah Shore Drive. Many of these corridors lack functional detour alternatives in the event of closures. During Tropical Storm Hilary in 2023, for example, multiple I-10 exits were rendered impassable due to mudflows and water damage, stranding travelers and emergency vehicles. Similar disruptions have occurred during past seismic and flood events, exacerbated by the region’s topography and limited east-west redundancy.
Additionally, Cathedral City lies adjacent to the Union Pacific (UP) Railroad main line, one of the busiest freight corridors in the western United States. An estimated 50 to 100 freight trains traverse the Coachella Valley daily between Colton Crossing and Yuma, Arizona. This includes hazardous materials shipments and heavy cargo that, if derailed, could result in substantial threats to life, infrastructure, Local Hazard Mitigation Plan Update
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and environmental safety. Though derailments are infrequent, their potential severity requires inclusion in regional hazard mitigation planning.
Air transportation represents another critical dimension of transportation vulnerability. Cathedral City is approximately 5 miles southeast of Palm Springs International Airport (PSP), which served over 3.2 million passengers in 2024 and is projected to ex ceed 6 million by 2042. While the airport is located outside of Cathedral City's jurisdiction, its proximity and role as an emergency coordination hub and economic driver mean that disruptions -whether due to wildfire smoke, flood, airspace incidents, or security events-can affect regional mobility and response operations.
Transportation-related disruptions pose particular challenges for Cathedral City’s emergency evacuation planning, supply chain continuity, and access to healthcare and emergency services. This is especially relevant for populations with mobility constraint s, those living in hillside or cul -de-sac developments, and areas with limited ingress and egress points, such as the Cove District, portions of north Cathedral City, and neighborhoods adjacent to Edom Hill.
Planned infrastructure projects, including the proposed Coachella Valley –Los Angeles passenger rail line, will add future transportation options but may also introduce new safety and coordination considerations. Hazards affecting any component of this multimodal system-roadways, rail, or air-may ripple through Cathedral City’s built environment and community systems, requiring robust contingency planning and interagency coordination.
Location and Extent
Transportation-related disruptions can occur citywide but are most acute along Cathedral City’s limited east–west and north –south corridors, which serve as the primary conduits for regional mobility, emergency response, and goods movement. The most critical transportation infrastructure includes:
• Interstate 10 (I -10): A federally designated Strategic Highway Network (STRAHNET) route and major freight and evacuation corridor. Closures along I -10 impact all of Cathedral City, particularly when alternate routes such as Varner Road or Ramon Road are simultaneously affected by storm, debris, or crash events.
• State Route 111 (SR -111): A key arterial that links Cathedral City with Palm Springs and Rancho Mirage. SR -111 is susceptible to closure due to flooding, sand accumulation, and stormwater damage.
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• Union Pacific Railroad Corridor: This active freight rail line runs north of Cathedral City and carries hazardous cargo. The corridor is vulnerable to derailment risk, particularly in segments with aging infrastructure or exposure to seismic shaking. • Gene Autry Trail, Date Palm Drive, and Cathedral Canyon Drive: These city roadways serve as vital local connectors and are used heavily during I-10 closures or detours. They are vulnerable to flood inundation and post-storm debris deposition.
• Palm Springs International Airport (PSP): Although outside city limits, PSP is less than 5 miles from Cathedral City’s civic center and is a key access point for residents, tourists, and emergency services.
Relationship to Land Use and Development
The transportation network intersects directly with Cathedral City’s residential, commercial, and industrial development patterns. Residential neighborhoods such as the Cove, Panorama, and Century Park are built along or near key arterial roadways and would be significantly affected by road closures, particularly during emergency evacuations. Industrial and warehouse development is concentrated in the southwestern and northern portions of the city, adjacent to both rail and freeway infrastructure, increasing the potential consequences of disruptions related to derailments or hazmat spills.
Many of Cathedral City’s commercial corridors -particularly along East Palm Canyon Drive (SR -111) and Date Palm Drive-depend on uninterrupted roadway access for supply deliveries, customer access, and business continuity. Similarly, development near the Whitewater River Stormwater Channel must account for both hydrologic and transportation vulnerabilities, given the flood -prone nature of adjacent roadways and crossings.
Recent growth and future development near Varner Road, Rio del Sol Road, and within North City Specific Plan areas are expanding into zones with limited existing transportation redundancy. These areas require targeted planning to integrate emergency ingres s/egress, storm -resilient design, and coordination with regional evacuation strategies.
The expansion of regional rail service through the proposed Coachella Valley–Los Angeles rail project will also necessitate new planning considerations, including grade separation, emergency response access to track -adjacent areas, and coordination with ex isting road networks. Development near the proposed corridor-especially in northern Cathedral City-must be evaluated for exposure to both service disruptions and potential derailment hazard buffers.
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Magnitude and Severity
Transportation-related disruptions in Cathedral City can range from minor delays and detours to full- scale regional emergencies that isolate entire sections of the city. The severity of these disruptions depends on the type of incident, the location within the transportation network, and the presence-or absence-of redundant access routes.
Incidents of moderate to high severity are most commonly associated with:
• Storm-related roadway washouts, mudflows, and debris blockages, particularly along Gene Autry Trail, Vista Chino, and Cathedral Canyon Drive during monsoonal rain events or post - fire debris flows.
• Rail derailments, especially those involving hazardous cargo such as flammable liquids or pressurized gases. Though less frequent, these events have high consequence potential due to proximity to residential neighborhoods and arterial roadways. A hazardous materials derailment could trigger shelter-in-place orders or evacuations over a wide area. • Air transportation disruptions linked to Palm Springs International Airport (PSP), which can impact emergency medical transport, regional logistics, and evacuation efforts during wide - area disasters. Delays or closures at PSP are often related to strong wind events (e.g., Santa Ana conditions) or low-visibility conditions caused by sand and dust. • Traffic collisions or hazmat spills on I -10 or SR -111, which can result in extended freeway closures and rerouting through local surface streets, overwhelming local capacity and delaying emergency response.
The impacts of these disruptions extend beyond mobility. In events where I -10, SR-111, or Varner Road are simultaneously compromised, Cathedral City faces a temporary loss of regional access, with cascading effects on:
• Emergency response and evacuation coordination.
• Supply chain continuity, particularly for fuel, medical supplies, and food distribution. • Economic activity, as retail centers, hospitality corridors, and industrial sites become inaccessible.
Severity is also heightened by Cathedral City’s limited number of east –west and north–south arterial routes, making even localized blockages or traffic incidents consequential for community-wide access.
Notably, during Tropical Storm Hilary (2023), multiple freeway and arterial exits were closed between Washington Street and Highway 111, severely limiting regional egress.
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Based on FEMA’s Threat and Hazard Identification and Risk Assessment (THIRA) methodology, the severity scale for transportation-related disruptions in Cathedral City can be summarized as:
• Low Severity (frequent): Short -term congestion or local road detours (e.g., due to traffic collisions or minor flooding).
• Moderate Severity (periodic): Extended road closures due to flooding, debris flow, or multi - vehicle accidents requiring detour implementation.
• High Severity (infrequent): Multi -day closures of regional routes (e.g., I -10), hazmat-related derailments or spills, or airport shutdowns that impact emergency logistics and public safety.
The California Department of Transportation (Caltrans) has identified SR -111 and I-10 as vulnerable to stormwater and debris flow hazards in regional adaptation plans, with both corridors serving as lifelines for the Coachella Valley.
The California State Hazard Mitigation Plan (2023) also recognizes transportation network vulnerability-particularly in inland desert regions -as a key interdependency risk in the context of climate change, seismicity, and extreme weather.
Historical Occurrences
FEMA Disaster Declarations
Incident
Subcategory County FEMA Declaration
String
Calendar Year of
Declaration
Date
Month
Declaration
Date
Declaration
Title State
None None None None None None None None
California Governor-declared Declarations
DATE OF DISASTER TYPE OF DISASTER COUNTIES INVOLVED
None None None
List of Governor-declared disasters for property tax purposes since 1991. Source: California State Board of Equalization Cathedral City has experienced multiple significant transportation-related disruptions in recent years, often triggered by extreme weather events, seismic conditions, or infrastructure failures. These disruptions have affected local and regional mobility, emergency response access, and goods movement throughout the Coachella Valley.
Key historical incidents include:
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• Tropical Storm Hilary (August 2023): This rare tropical storm brought intense rainfall to Cathedral City and the surrounding region, causing widespread flooding and debris flows.
Nearly all eastbound and westbound I -10 exits between Washington Street and SR -111 were impassable for several hours due to floodwaters and mud deposits. Key arterial routes including Vista Chino, Gene Autry Trail, and Cathedral Canyon Drive were also closed, creating citywide access challenges and delaying emergency services.
• January 2019 Windstorm and Sand Event: High winds exceeding 60 mph led to visibility - related road closures along I -10 near Date Palm Drive and SR -111 through Palm Springs and Cathedral City, disrupting commuter and freight movement. Blowing sand created hazardous conditions for both vehicles and pedestrians and temporarily halted travel through the Varner Road corridor.
• Union Pacific Freight Train Delays and Disruptions: Although no major derailments have occurred in Cathedral City to date, freight traffic of 50 to 100 trains per day on the Union Pacific mainline -running parallel to I -10-has been subject to service interruptions due to weather, track obstructions, or downstream infrastructure issues. A significant train derailment near Mecca in 2015 led to service suspensions that affected regional cargo and supply chains, with indirect impacts on Coachella Valley distribution timelines. • July 2013 Flash Flooding: A monsoonal downpour caused a rapid rise in Cathedral Canyon Wash, leading to the temporary closure of Cathedral Canyon Drive south of Dinah Shore Drive.
Adjacent properties experienced localized access constraints due to water over roads and sediment deposition.
• PSP Airport Weather Delays: Palm Springs International Airport (PSP), just northwest of Cathedral City, has experienced multiple wind -related flight cancellations and diversions, particularly during Santa Ana wind events or low -visibility conditions tied to sand and dust.
While PSP remains a critical emergency and passenger hub for the region, its proximity to hazard-prone corridors adds operational vulnerability.
While catastrophic incidents like large -scale train derailments or air transport crashes have not occurred in Cathedral City, the cumulative impact of recurring roadway disruptions, extreme weather, and freight delays highlights the vulnerability of the city’s transportation network.
Given these patterns and the projected increase in extreme weather due to climate change, historical trends underscore the need for investment in redundant infrastructure, interagency coordination, and emergency traffic management.
Probability and Effects of Future Conditions
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Overall probability over next five years: Moderate.
The probability of future transportation-related disruptions in Cathedral City is considered moderate, with frequency and severity influenced by a combination of climate -related hazards, seismic vulnerability, and the City’s reliance on a limited number of critical roadways and utility corridors. As population growth, regional travel, and freight volumes increase across the Coachella Valley, the city’s exposure to transportation disruption risks is also expected to rise.
Several trends influence future risk:
• Extreme Weather Intensification: Projected increases in extreme heat, intense rainfall, and high wind events will likely result in more frequent roadway washouts, flood-induced closures, and visibility reductions due to sand and debris. According to California’s Fourth Climate Change Assessment, storm intensity is projected to increase by up to 15–20% by mid-century, with implications for roadway drainage and slope stability. • Limited Redundant Roadway Network: Cathedral City’s internal circulation system is dependent on a small number of north -south corridors (e.g., Date Palm Drive, Cathedral Canyon Drive, Landau Blvd) and east-west routes (e.g., Dinah Shore Drive, Vista Chino, Ramon Road). During Tropical Storm Hilary in 2023, simultaneous closures of multiple crossings over the Cathedral Canyon Wash and Whitewater River demonstrated the vulnerability of this constrained network. As development continues along foothill zones and eastern edges of the city, the demand for reliable alternate evacuation and supply routes will increase. • Increased Freight and Rail Traffic: With 50 to 100 Union Pacific freight trains per day passing through the region and proposals for new intercity passenger rail service between Los Angeles and the Coachella Valley, the likelihood of system stress and cascading delays from derailments, collisions, or infrastructure failure will increase -particularly during multi-hazard events such as earthquakes or flooding.
• Proximity to Palm Springs International Airport (PSP): PSP’s projected growth to 6.4 million annual passengers by 2042 will elevate the regional significance of uninterrupted surface access to the airport. During high wind or flooding events, roadway closures on
Vista Chino and Gene Autry Trail can restrict airport access, posing both economic and emergency response challenges.
• Seismic and Post -Earthquake Access Constraints: Cathedral City’s transportation infrastructure-particularly bridges and culverts crossing natural washes and flood channels - may be vulnerable to closure or damage following a major earthquake. Inaccessibility of key routes during post -disaster response windows would hinder evacuation, firefighting, and supply distribution efforts.
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Future conditions also indicate that transportation disruptions could intersect with socioeconomic vulnerability, disproportionately affecting transit -dependent, elderly, disabled, and low -income residents who may lack immediate access to private vehicles or alternative routes during emergencies.
These populations are more likely to reside in areas where redundant access is limited, and service restoration may be delayed.
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SECTION 4 – VULNERABILITY ASSESSMENT
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Element B: Risk Assessment Requirements
B2. Does the plan include a summary of the jurisdiction's vulnerability and the impacts on the community from the identified hazards? Does this summary also address NFIP insured structures that have been repetitively damaged by floods? (Requirement 44 CFR § 201.6(c)(2)(ii))
4.1 Introduction
Vulnerability assessments are critical tools for identifying the people, infrastructure, and assets most at risk from natural and human-caused hazards. By systematically analyzing how hazards interact with community characteristics such as demographics, land use, critical facilities, and environmental conditions, the assessment helps determine who and what are most vulnerable to disasters.
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4.2 Hazard-Specific Vulnerability Analysis
4.2.1 Extreme Heat
Overall Vulnerability and Impact
Cathedral City faces mounting vulnerability to extreme heat events as a result of rising global temperatures and localized urban heat island (UHI) effects. According to Cal-Adapt and the California Fourth Climate Change Assessment, average annual temperatu res in the region are projected to increase by 4.4°F to 5.8°F by 2050 under high -emissions scenarios (RCP8.5). The city already experiences summer highs that frequently exceed 110°F, and by mid-century, Cathedral City could face an average of 32 days per year above 111.9°F, compared to just 7 days in 1990.
In addition to direct health impacts -such as heat exhaustion, heat stroke, and dehydration -extreme heat compounds air quality degradation, electricity demand, and regional drought stress. The city’s physical landscape-including widespread impervious surfaces, large asphalt parking lots, and industrial zones concentrated along East Palm Canyon Drive, Perez Road, and the Date Palm Drive corridor - further intensifies local surface temperatures. The city’s limited tree canopy cover, particularly in commercial an d industrial areas, amplifies heat stress for both built infrastructure and vulnerable residents.
Population Exposure
The entire population of Cathedral City is exposed to the risks of extreme heat. However, risk is not evenly distributed. High -Social Vulnerability Index (SVI) census tracts -especially in the Cove neighborhood, Dream Homes, and areas north of Vista Chino-experience greater exposure due to older housing stock, limited shade, and fewer private cooling systems.
Critical Facilities
Critical facilities such as Southern California Edison substations, CVWD and DWA water infrastructure, and emergency operations centers face operational pressure under prolonged heat conditions. While heat itself does not structurally damage these facilities, it drives peak load stress on electrical systems and increases the probability of rotating outages or system faults. During high heat days, air conditioning demand can spike significantly, and if outages occur, essential facilities-including fire stations, cooling centers, and the Cathedral City Senior Center-may be compromised.
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Water and wastewater systems are also impacted. Heat can reduce pumping efficiency, raise water temperatures, and impair chemical treatment processes, particularly in older facilities such as those serving the city's east and northeast service areas. Sustained high temperatures may also reduce pressure in overhead transmission systems, limiting regional power flow.
Non-Critical Facilities
Schools such as Cathedral City High School and James Workman Middle School face heat-related risks due to aging HVAC systems and outdoor campus designs with minimal shade. Commercial and industrial facilities along Perez Road and Ramon Road corridors also report rising energy costs and indoor temperature hazards, especially where facilities lack modern insulation or cooling retrofits.
Increased heat also reduces workplace productivity in warehousing and manufacturing sectors, which represent a substantial share of the city's employment base. Construction crews, outdoor logistics teams, and auto center employees are especially vulnerable to midday heat exposure.
Environmental Impacts
Extreme heat has multifaceted environmental impacts in Cathedral City:
• Urban Heat Island Intensification: Industrial surfaces, unshaded arterial roads like East Palm Canyon Drive and Gerald Ford Drive, and concrete-heavy developments increase local ambient temperatures by up to 8°F compared to surrounding natural landscapes. • Air Quality Degradation: High temperatures contribute to ground -level ozone formation, worsening respiratory conditions, particularly for children and elderly residents in high-traffic corridors.
• Water Supply Stress: Increased cooling demand accelerates municipal water use, while ongoing drought conditions reduce supply resilience from the Coachella Valley Aquifer and Colorado River allocations.
Changes in Development Since Last Approved Plan
Development Trends: Since the 2018 LHMP, Cathedral City has experienced continued industrial and commercial growth, particularly north of Interstate 10 and along Date Palm Drive. This development has increased impervious surface area, contributing to urban heat retention and localized exposure to extreme heat events.
Land Use and Zoning: No new zoning ordinances or land use policies have been adopted to address extreme heat through urban forestry requirements, green infrastructure standards, or reflective Local Hazard Mitigation Plan Update
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(albedo-enhancing) building materials. Tree canopy coverage remains limited, especially in commercial zones and multi-family residential areas.
Population Shifts: The proportion of residents aged 65 and older has increased to approximately 18.4% of the total population (ACS 2022). This demographic trend heightens the city’s vulnerability to extreme heat events due to age -related sensitivity, chronic health conditio ns, and reliance on air conditioning systems during prolonged heatwaves.
Impacts on Vulnerable Populations
Low-Income Residents: Many households in Cathedral City-particularly in central and eastern census tracts-lack access to efficient cooling systems. High utility costs may lead residents to reduce air conditioning use, resulting in unsafe indoor temperatures during prolonged he at events. These areas align closely with high-SVI designations and older rental housing stock.
Elderly Individuals: Seniors are at elevated risk of heat-related morbidity and mortality. Many live in single-story homes or mobile home parks without central air or sufficient insulation. Social isolation further impairs emergency response and cooling access.
People with Disabilities: Individuals reliant on electrically powered devices (e.g., ventilators, CPAP machines, motorized wheelchairs) are at high risk if rolling blackouts or outages occur during heat events. Mobility impairments also limit access to designated cooling centers such as the Cathedral City Library or Senior Center, especially without family or transit assistance.
Outdoor Workers: The city’s logistics, maintenance, and construction workforce is frequently exposed to high surface temperatures during peak summer months. Without scheduled hydration breaks, shade, and heat training, workers remain at elevated risk of heat exhaustion an d productivity loss. These impacts are particularly acute in areas under active development such as the North City Specific Plan area.
Unhoused Individuals: The city's unhoused population, estimated at 82 individuals in the latest PIT Count, is highly exposed during heatwaves. Many individuals reside near commercial corridors, flood channels, and freeway underpasses, where radiant heat from asphalt and metal structures intensifies exposure. Lack of access to hydration, shelter, or transportation compounds this risk. During extreme heat days, the city coordinates with Riverside County Emergency Management to activate emergency cooling centers and deploy homeless outreach teams.
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4.2.2 Drought
Overall Vulnerability and Impact
Cathedral City is highly vulnerable to drought due to its geographic position in the Colorado Subunit of the Sonoran Desert and its reliance on groundwater from the Indio Subbasin, as well as imported water to replenish the Indio Subbasin from the Colorado River via the Colorado River Aqueduct and the State Water Project (through a transfer agreement with Metropolitan Water District). The city receives an average of approxi mately 4.1 inches of annual rainfall, most of which occurs between November and March . This limited local precipitation makes Cathedral City dependent on external water supplies and long-term groundwater storage.
Climate change is expected to exacerbate drought conditions by increasing average annual temperatures by 4.4°F to 5.8°F by mid-century and reducing snowpack in the Sierra Nevada and Upper Colorado River Basin, both of which feed critical water sources for Southern California. Diminished snowmelt and extended dry seasons will strain water allocations to the Coachella Valley Water District (CVWD) and Desert Water Agency (DWA), Cathedral City’s primary water purveyors.
Drought impacts extend beyond water scarcity. Less efficient groundwater recharge due to higher evapotranspiration rates threatens long -term water sustainability. Prolonged dry conditions increase dust and fine particulate pollution, contributing to respiratory illness and degraded air quality. The risk of wildfires in surrounding foothill areas is also heightened, and water -intensive landscaping losses exacerbate urban heat island effects.
Population
All 51 census tracts in Cathedral City are exposed to drought -related impacts, though effects vary by income level, housing condition, and access to cooling or supplemental water sources. Populations living in older mobile homes or multi-family units-common in areas like the Cathedral Canyon Drive corridor-are more likely to face dehydration, utility shut-offs, and secondary heat impacts.
Critical Facilities
Drought does not structurally damage critical infrastructure, but it does create operational vulnerabilities. Water treatment facilities, fire suppression systems, and emergency medical facilities are dependent on consistent and pressurized water delivery. In drought years, reduced groundwater Local Hazard Mitigation Plan Update
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recharge from the Whitewater Replenishment Facility affects CVWD’s ability to maintain stable aquifer levels.
Fire suppression capabilities -particularly in wildland -urban interface zones near Cathedral Canyon Wash and the southern edges of the Cove neighborhood -are at risk if water pressure drops or storage levels decline. Additionally, prolonged drought may incre ase electricity demand for water pumping and treatment, straining both energy and water infrastructure simultaneously.
Non-Critical Facilities
Commercial and residential water consumers-including apartment complexes, hotels, and golf resorts- face mandatory water restrictions during severe drought. Businesses in landscaping, construction, and hospitality report increased operating costs, loss of r evenue, and reduced landscape aesthetic appeal.
Drought-tolerant landscaping incentives and tiered water pricing by CVWD and DWA have helped to reduce waste, but some properties have struggled to retrofit or maintain xeriscape transitions.
Residential yards in central Cathedral City, particularly within HOA -managed communities and mobile home parks, are disproportionately affected by visible water stress, increasing evapotranspiration rates and contributing to higher local temperatures.
Environment
Drought significantly impacts the natural environment, reducing water availability for local ecosystems, increasing wildfire risk, and degrading air quality. • Water Availability: The Whitewater River watershed, which supports the Coachella Valley Groundwater Basin, has experienced drought conditions in 80% of weeks since 2000, with 17% of those weeks classified as Extreme or Exceptional Drought (U.S. Drought Monitor, 2024). • Wildfire Risk: While Cathedral City is not within a designated Very High Fire Hazard Severity Zone, nearby mountain slopes (Santa Rosa and San Jacinto ranges) experience elevated wildfire risk during dry seasons. Blown embers from fires in these areas can threaten neighborhoods at the urban edge.
• Air Quality: Prolonged drought increases fugitive dust emissions and PM10 concentrations, particularly along unpaved lots, construction zones, and riverbeds such as the Whitewater Channel. This contributes to elevated AQI levels and frequent air quality alerts during the spring and fall.
• Urban Tree Canopy: Ongoing drought reduces urban tree health, especially in public medians, parkways, and the Civic Center complex, leading to increased canopy loss and reduced cooling Local Hazard Mitigation Plan Update
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benefits. Tree mortality from drought and bark beetle infestation has also been observed in community parks and older neighborhoods.
Changes in Development Since Last Approved Plan
Development Trends: New residential subdivisions and commercial centers have been constructed since the last LHMP update, increasing total water demand. However, water -efficient appliances and drought-tolerant landscaping requirements in new construction -per CVWD’s Water Eff icient Landscape Ordinance-have mitigated per capita use.
Land Use and Zoning: While the city has not enacted major zoning amendments directly targeting drought vulnerability, landscape ordinances and conservation regulations adopted by CVWD and DWA are enforced within city limits. These include turf reduction mandates and recycled water incentives.
Population Shifts: Although the city’s total population has remained stable, there is an increasing share of residents aged 65 and over (18.4%), who are more susceptible to dehydration and fixed -income utility burden.
Impacts on Vulnerable Populations
Low-Income Residents: Residents in cost-burdened households may be unable to afford rising water rates or fines for overuse. They are less likely to own high -efficiency appliances or have access to subsidized drought retrofit programs. These impacts are most concentrated in the city’s central and eastern census tracts, based on ACS 2022 and CVWD affordability thresholds.
Elderly Individuals: Seniors are more likely to suffer heat-related illnesses exacerbated by limited water access, especially during billing moratoriums or water shut -offs. Older residents also have limited mobility, which may hinder access to water distribution or assistance sites during supply interruptions.
People with Disabilities: Individuals requiring dialysis, cooling systems, or humidifiers are particularly vulnerable to drought -related utility disruptions. Accessibility barriers further limit their ability to obtain emergency water or seek medical help during compounded events (e.g., drought and heatwave).
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risks. Many of these workers are based in Cathedral City’s industrial zones along Perez Road, Edom Hill, and the West Cathedral Canyon area.
Unhoused Individuals: The city's unhoused residents have very limited access to clean water for hydration, hygiene, and cooling. During summer drought periods, public restrooms and hydration stations become critical for survival. This group remains one of the most at risk and is
targeted for support by the Cathedral City Homeless Outreach and Housing Team (HOHT) in coordination with Riverside County Health Services.
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4.2.3 Fire (Urban and Wildfire)
Overall Vulnerability and Impact
Cathedral City faces compound fire risks from both urban and regional wildfire hazards. Although the city itself is not currently within a Cal Fire-designated Very High Fire Hazard Severity Zone (VHFHSZ) per the 2022–2025 updated maps, it remains vulnerabl e to indirect wildfire impacts from the nearby Santa Rosa and San Jacinto Mountains. Wildfires in these areas -such as those that have affected the Palm Springs Aerial Tramway region or Highway 74 corridors -pose risks through smoke transport, degraded air quality, and ember ignition carried by Santa Ana winds.
Climate change is expected to exacerbate fire risk by extending the duration and intensity of fire seasons. More frequent heatwaves and prolonged drought conditions will continue to dry out vegetation and create favorable conditions for ignition. Santa Ana winds, which blow through the San Gorgonio Pass into the Coachella Valley, can rapidly transport embers into urban areas, increasing ignition risk along the western and southern edges of the city, particularly near the Cove neighborhood, Cathedral Canyon Wash, and landscaped commercial zones near East Palm Canyon Drive.
Urban fire hazards are primarily concentrated in Cathedral City’s aging commercial and residential sectors, where older buildings-particularly those with outdated electrical infrastructure or no internal sprinkler systems-remain vulnerable to rapid fire spread. Industrial corridors along Perez Road, Ramon Road, and Date Palm Drive house auto repair shops, fuel storage areas, and light manufacturing uses that include combustibles or flammable materials, contributing to localized ignition potential. Mobile home parks-such as those east of Landau Boulevard, Vista Chino, and Dinah Shore Drive-face elevated risk due to building materials, density, and limited evacuation access.
Population
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The entire population of Cathedral City is potentially exposed to fire hazards, though levels of vulnerability vary significantly by location, structural conditions, and socioeconomic factors. Mobile home residents, individuals in high-density multi-family developments, and residents near commercial corridors face heightened exposure.
Critical Facilities
Fire incidents that disrupt or damage critical infrastructure pose a substantial threat to citywide resilience. Cathedral City operates three fire stations:
• Fire Station 411 (36913 Date Palm Drive)
• Fire Station 412 (32100 Desert Vista Road)
• Fire Station 413 (27610 Landau Boulevard)
These stations serve not only the city but participate in mutual aid agreements across Riverside County.
Medical facilities such as urgent care centers and long-term care homes, particularly along Gerald Ford Drive, depend on reliable HVAC and filtration systems to safeguard at-risk populations during wildfire smoke events.
Electrical substations and transformers maintained by Southern California Edison (SCE) near Edom Hill and along Vista Chino are critical to maintaining energy resilience. Fire -induced failures at these locations could result in widespread outages. Additionally, Cathedral City's portion of the CVWD and Desert Water Agency (DWA) systems must be maintained during fire events to support water pressure for firefighting. Pump stations, particularly near Dinah Shore Drive and Canyon Plaza, are at risk of thermal or smoke-related mechanical failure during extended fire events.
Non-Critical Facilities
Cathedral City’s logistics and retail sectors, particularly along Ramon Road, East Palm Canyon Drive, and the Perez Road industrial corridor, include numerous facilities with high ignition potential and combustible stockpiles. These areas could experience significant economic losses in the event of an industrial fire. Fire propagation through older commercial centers -many of which pre -date modern fire code requirements-could lead to multi-structure events.
Educational institutions like Cathedral City High School, located in the north -central portion of the city, are also susceptible to wildfire smoke infiltration and may be forced to close if indoor air quality Local Hazard Mitigation Plan Update
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declines during regional fire events. Disruption to school operations affects working families and vulnerable student populations, many of whom rely on schools for daily meals and health support.
Environment
Urban and regional fire hazards in Cathedral City can result in direct and cascading environmental consequences:
• Air Quality Impacts: Cathedral City already experiences frequent poor air quality days during the fall wildfire season. AQMD data indicates the region regularly exceeds National Ambient Air Quality Standards (NAAQS) for PM2.5 and ozone during large regional fires.
• Water Contamination: Chemical and oil runoff from vehicle service shops or paint storage facilities in the industrial districts can pollute the Cathedral Canyon Wash, especially when mixed with fire suppression foam or damaged sprinkler systems. • Vegetation Loss: City-maintained street trees and small parklands-particularly in Town Square Park and Panorama Park -may be lost to localized structure fires or ember ignition, further degrading urban cooling services.
• Ember Transport Risk: Areas along Eagle Canyon Dam, Varner Road, and the city’s southern boundary are particularly exposed to wind -borne embers from wildfires in the foothills, including mudflow-prone canyons.
Changes in Development Since Last Approved Plan
Development Trends: Since the last LHMP, Cathedral City has experienced continued growth in both residential and commercial sectors. While recent developments comply with the latest California Building and Fire Codes -including ignition -resistant materials and defensible spac e requirements - legacy developments continue to account for a majority of the city’s structure fires.
Land Use and Zoning: While fire-resistant requirements are in place in zoning and building regulations, no significant rezoning or annexations have shifted the city’s exposure to fire risk. However, increased warehouse and mixed -use development within the North City Specific Plan and East Palm Canyon corridor has added potential structural and economic vulnerability.
Population Trends: The city’s aging population -over 18.4% age 65 and older, according to the 2022 ACS-represents an increased demand on evacuation and sheltering services during fire or smoke emergencies.
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Impacts on Vulnerable Populations
Low-Income Residents: Many lower -income residents live in housing without central HVAC or filtration. With limited renters insurance and no disaster savings, they face prolonged displacement or loss following a fire.
Elderly Individuals: Seniors, especially those in isolated homes or senior housing without elevators, may be unable to evacuate during fast -moving fire events. Their pre -existing health conditions also place them at risk from smoke-related illnesses.
People with Disabilities: Accessible transport, mobility support, and power-dependent medical devices are all critical during fire evacuations. These individuals may require registry -based support and medically equipped shelters.
Outdoor Workers: Fire-related air quality degradation affects construction, delivery, and public works crews. OSHA-compliant protective gear and adjusted work schedules are essential to prevent heat and smoke exposure.
Unhoused Individuals: Many unhoused persons reside along drainage channels or near commercial plazas. Without access to clean indoor air or transportation, they are at high risk during both urban and regional fire events.
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4.2.4 Power Outage
Overall Vulnerability and Impact
Cathedral City is vulnerable to power outages resulting from multiple hazard types, including extreme heat, high winds, wildfires, and earthquakes. These outages may be brief or prolonged, depending on the disruption's severity and cause. Southern Californ ia Edison (SCE) maintains Cathedral City’s electric service infrastructure and, in high -risk fire weather, may implement Public Safety Power Shutoffs (PSPS) to reduce ignition hazards, especially during Santa Ana wind events. Although PSPS events have more frequently affected unincorporated and mountainous areas of Riverside County, their cascading effects-including cellular outages and traffic signal disruptions -can extend into Cathedral City.
The city's electrical infrastructure includes major transmission lines along Date Palm Drive, Landau Boulevard, and Dinah Shore Drive, with several substations serving residential and commercial zones.
Power outages, particularly during high-demand periods in summer, have potential to impact medical services, cooling capacity, traffic operations, and emergency communication.
Climate change is intensifying these risks. Elevated temperatures increase demand for cooling, putting additional strain on the regional grid. Prolonged outages can disrupt not only routine services but also emergency response capacity, particularly for in dividuals reliant on electrically powered medical devices and refrigeration for essential medications. During Tropical Storm Hilary in August 2023, for example, a regional fiber line was severed, disrupting 911 communications throughout the Coachella Valley. Cathedral City was forced to reroute emergency calls to non -emergency business lines, underscoring the vulnerability of critical communications infrastructure.
Population
The entire population of Cathedral City is exposed to potential power outages, but those in heat-prone housing, medically vulnerable households, and residents lacking backup systems are at elevated risk.
Power outages impact refrigerated food storage, communication systems, and access to transportation, disproportionately affecting those without backup power options. Growing adoption of electric vehicles, especially in newer developments, may further constrain mobility during widespread outages if charging infrastructure is compromised.
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Critical Facilities
Power outages pose serious risks to critical infrastructure, including Cathedral City Fire Stations 411, 412, and 413, police facilities, water and wastewater treatment systems, and public health institutions.
Most of these facilities are equipped with bac kup generators, but sustained outages may exhaust fuel reserves or strain equipment.
Water and wastewater systems managed by CVWD and DWA rely on electric pumps and telemetry controls. Outages can lead to drops in water pressure, limiting firefighting capacity and increasing contamination risk. Additionally, traffic signals and emergency c ommunication networks may lose function without adequate backup systems, impeding incident response and evacuation efforts.
Non-Critical Facilities
Businesses across Cathedral City, including retail centers along East Palm Canyon Drive and Ramon Road, industrial operations on Perez Road, and logistics facilities, are vulnerable to outages. Economic losses from halted operations, spoilage, and supply chain disruptions can be significant, particularly for temperature-sensitive sectors such as food service and warehousing.
Schools and community centers-especially those serving as designated cooling shelters-may be forced to close if outages occur during extreme heat. This disrupts educational continuity and reduces access to safe indoor environments during climate emergencies.
Residential impacts are most severe among households that lack access to generators or battery storage.
Loss of internet and cellular service may isolate residents from emergency information, while food spoilage and loss of HVAC systems can endanger health and safety, especially during summer heatwaves.
Environment
While outages do not directly damage natural environments, indirect impacts can include:
• Air Pollution: Generator use increases emissions of carbon monoxide and particulate matter.
Extended use during outages-especially in industrial zones-can degrade air quality. • Hazardous Spills: Facilities using automated containment or refrigeration systems may experience chemical releases or leaks if these systems fail.
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• Water Quality Risk: Interruptions in wastewater pumping or treatment can increase the likelihood of untreated discharges into the Cathedral Canyon Wash or other local drainage systems.
Changes in Development Since Last Approved Plan
Development Trends: Cathedral City has seen ongoing industrial and commercial growth, increasing demand on the regional power grid, especially in newer industrial parks and the North City Specific Plan area.
Land Use and Zoning: No zoning changes have significantly altered the city’s exposure to power outage risks. However, increasing density and reliance on electric vehicles and HVAC systems heighten overall system dependency.
Population Shifts: While overall population growth has been slow, the proportion of residents over age 65 has increased to 18.4% as of the 2022 ACS. This demographic trend heightens the importance of energy resilience in residential facilities and healthcare centers.
Impacts on Vulnerable Populations
Low-Income Residents: These households may lack access to alternative energy sources such as generators or battery-powered fans, leading to increased exposure during outages. Limited resources also mean they are more likely to experience food insecurity following refrigerator failure.
Elderly Individuals: Many older adults rely on air conditioning, oxygen concentrators, or refrigerated medications. Outages may significantly impair their ability to remain safely at home, particularly if communication systems are also disrupted.
People with Disabilities: For individuals who use powered mobility aids, ventilators, or home dialysis machines, electricity loss is potentially life -threatening. Backup power and accessible transport are essential for emergency preparedness.
Unhoused Individuals: Many rely on public facilities for access to electricity, water, and shelter. If libraries, cooling centers, or shelters lose power, access to safe indoor environments is lost.
Non-English-Speaking Populations: Without multilingual alerts and culturally tailored outreach, these residents may not be aware of power outage protocols or cooling center locations, limiting their ability to respond effectively.
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4.2.5 Earthquake
Overall Vulnerability and Impact
Cathedral City is highly vulnerable to earthquakes due to its proximity to major active fault systems, including the San Andreas Fault, Banning Fault, Garnet Hill Fault, and San Jacinto Fault Zone. The San Andreas Fault, which runs northeast of the city al ong the Indio Hills Fault section, represents the greatest seismic threat and is capable of generating earthquakes exceeding magnitude 8.0. The Banning Fault, an active strand of the San Andreas system, is capable of producing magnitude 7.4 earthquakes with peak ground accelerations ranging between 0.45g and 0.9g, which could severely impact structures and infrastructure throughout the city.
Ground shaking remains the most significant threat; however, liquefaction, surface rupture, lateral spreading, and utility disruptions also pose serious risks. Liquefaction potential is highest in the northern areas of Cathedral City where water tables are shallower and soils are more susceptible, particularly near the Whitewater River and adjacent to the San Andreas Fault zone. Seismically induced settlement and ground deformation are also risks in areas underlain by unconsolidated alluvial sediments, common in central and northern portions of the city.
An earthquake could cause major disruptions to the city’s economic activities, particularly in industrial corridors like Perez Road, and could damage key transportation assets such as Interstate 10 and regional arterial roads. Widespread infrastructure damage, including to electricity, gas, and water systems, could compound emergency response difficulties.
Population
The entire population of Cathedral City is at risk from earthquake-related impacts. Residents living in unreinforced masonry buildings, older mobile homes, or non -retrofitted structures are especially vulnerable. People reliant on utilities for medical car e or mobility are disproportionately affected by service interruptions following seismic events.
Critical Facilities
Critical facilities-such as the Emergency Operations Center, police and fire stations, and healthcare providers-must remain functional during and after an earthquake. Fire Stations 411, 412, and 413 must be able to coordinate search-and-rescue, fire suppression, and emergency medical response operations.
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If these facilities sustain structural or system damage, Cathedral City’s emergency response capabilities would be significantly compromised.
Water and sewer systems operated by CVWD and DWA may be affected by ruptured pipelines and failed pumping stations. Transportation routes such as Date Palm Drive, Ramon Road, and Dinah Shore Drive may become impassable due to bridge damage or road collapse. Gas lines could rupture and cause fires in residential neighborhoods.
Non-Critical Facilities
Non-critical facilities -such as schools, houses of worship, commercial centers, and industrial warehouses-are still vulnerable to seismic damage. Buildings constructed prior to the 1980s without retrofitting may collapse or suffer major structural compromise. Commercial losses from supply chain interruptions and property damage could be extensive, particularly in auto sales, logistics, and light manufacturing.
Residential units, including multi-family housing and older mobile home parks, are at risk of collapse or loss of habitability. Displacement pressures would strain the city’s emergency shelter capacity, particularly in areas like the Cathedral Canyon Cove neighborhood, which includes older housing stock.
Environment
Earthquakes can cause landslides in the Santa Rosa Mountains and Indio Hills, threatening residential developments near the base of these slopes. Ground rupture, subsidence, and slope instability may result in utility corridor failures or closed roads.
Chemical leaks or hazardous spills from industrial areas along Perez Road or within the North City Specific Plan area could contaminate soil and groundwater. Earthquakes may also damage stormwater infrastructure, increasing the risk of localized flooding or stormwater pollution.
Changes in Development Since Last Approved Plan
Development Trends: New construction is required to meet seismic code standards; however, retrofitting of pre-code buildings remains incomplete in parts of the city.
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Land Use and Zoning: No significant changes in land use policy have occurred that alter citywide earthquake vulnerability.
Population Shifts: The percentage of residents over 65 has increased since the previous plan, necessitating additional planning for medical, mobility, and communication needs during post - earthquake recovery.
Impacts on Vulnerable Populations
Low-Income Residents: Recovery from earthquake damage may be delayed due to a lack of financial resources and access to insurance.
Elderly Individuals: Many seniors may require mobility assistance or power -dependent medical devices, heightening vulnerability during outages or evacuations.
People with Disabilities: Structural damage, inaccessible shelters, and disrupted support services can create major barriers for individuals with disabilities.
Unhoused Individuals: Earthquake response systems must account for unhoused residents, many of whom live in unsafe or informal shelters.
Non-English-Speaking Populations: Linguistic isolation may prevent access to emergency notifications and assistance. Multilingual communications are essential for effective response and recovery.
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4.2.6 Flooding
Overall Vulnerability and Impact
Cathedral City is vulnerable to flooding from multiple sources, including heavy rainfall, stormwater runoff, and infrastructure failures. Localized flooding occurs due to inadequate drainage, urban development, and extreme weather events. Approximately 14.2% of properties in Cathedral City are at risk of flooding over the next 30 years.
The region’s arid climate typically results in long dry periods, punctuated by intense storm events, particularly during winter and late summer monsoon season. Cathedral City’s urban landscape, with extensive industrial and commercial development, exacerba tes flood risk due to impervious surfaces that hinder natural water absorption. The Whitewater River Channel serves as the primary drainage facility for the city, conveying stormwater flows from multiple tributaries, including Cathedral Canyon Wash and East Cathedral Canyon Wash.
Secondary impacts of flooding include damage to transportation networks, disruptions to utilities, and increased mold risks, structural instability, and economic losses. Flash flooding is particularly concerning in areas with outdated or undersized stormwa ter infrastructure, including Gerald Ford Drive, Dinah Shore Drive, and the Date Palm Drive corridor, which have historically experienced closures due to floodwaters or debris flow.
Population
The entire population of Cathedral City is exposed to potential flooding, though the level of impact varies based on location, housing conditions, and socioeconomic factors. Residential areas near major storm drain channels, such as the Whitewater River, W est and East Cathedral Canyon Washes, and Eagle Canyon Wash, face elevated risks. Floodwaters pose direct hazards, including drowning, electrocution, and exposure to contaminated water.
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Critical Facilities
Critical facilities such as emergency response centers and utility infrastructure must remain operational during flood events to ensure public safety. Facilities with underground utility connections are vulnerable to water intrusion, which can cause equipm ent failure and extended service disruptions. Power substations and energy infrastructure-such as those near Vista Chino, Landau Boulevard, and Varner Road -may also be at risk of short circuits or outages from flood damage.
The Whitewater River drainage system carries stormwater from a 720 -square-mile watershed, generating peak flows of 47,000 cubic feet per second (cfs) during a 100 -year storm. The Coachella Valley Water District (CVWD) and Riverside County Flood Control and Water Conservation District (RCFCD) manage regional stormwater infrastructure to mitigate regional flooding risks . The city also coordinates with the Coachella Valley Association of Governments (CVAG) on roadway flood risk mitigation, including active projects along Varner Road and Date Palm Drive to improve stormwater capacity and reduce 100-year flood hazards.
Non-Critical Facilities
Non-critical facilities, such as schools, businesses, and industrial operations, may experience structural damage, utility failures, and operational disruptions during flood events. Commercial districts with large impervious surfaces -including East Palm Ca nyon Drive and Perez Road -are particularly susceptible to ponding and runoff issues. Industrial facilities are vulnerable to hazardous material spills if floodwaters interact with chemical storage or mechanical operations.
Environment
Flooding can have significant environmental consequences, including erosion, sedimentation, and water contamination. Industrial zones in Cathedral City contain facilities that store hazardous materials, increasing the risk of contamination during flood eve nts. Key environmental concerns include:
• Water Contamination: Flood events may overwhelm drainage systems, leading to water quality issues as runoff carries debris, oil, and chemicals into storm drains and waterways. • Soil Erosion and Sedimentation: Unstable slopes and developed areas with insufficient drainage may experience erosion, affecting natural habitats and infrastructure. This is especially relevant Local Hazard Mitigation Plan Update
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near the Santa Rosa Mountains foothills, where stormwater from upstream burn scars can accelerate debris flow, as occurred during Tropical Storm Hilary (2023). • Impact on Vegetation: Flooding can damage urban landscaping and reduce the effectiveness of stormwater control measures like green infrastructure and bioswales, particularly in newly developed or landscaped areas.
Localized feedback from residents highlights flood -prone areas where nature -based approaches—such as wetland restoration —may offer viable mitigation solutions. These areas merit further study for suitability as multi -benefit flood control sites that align with ecological and community goals, as demonstrated by successful models in Tempe and Tucson.
Changes in Development Since Last Approved Plan
Development Trends: Since the last hazard mitigation plan, Cathedral City has continued to expand commercial and industrial areas, especially north of Interstate 10 and along Palm Drive and Varner Road, increasing impervious surfaces and stormwater runoff.
Land Use and Zoning: No major zoning changes have significantly altered flood risk, though updates to the city’s Comprehensive Storm Drain Master Plan are in progress to address vulnerabilities.
Population Shifts: While overall population growth has been moderate, an increasing number of older adults and medically vulnerable individuals may require additional support during flood events.
Impacts on Vulnerable Populations
Low-Income Residents: Households with limited financial resources may struggle to recover from flood-related damages, particularly if they lack flood insurance. Temporary displacement due to flooding can create additional economic hardships, including lost wages and increased transportation costs
Elderly Individuals: Older adults may experience difficulties evacuating flood-prone areas, particularly those with mobility limitations. Flood -related power outages can also impact those reliant on electrically powered medical devices.
People with Disabilities: Individuals with disabilities may face heightened risks during flood events due to evacuation barriers, reliance on accessible transportation, and potential disruption of medical services.
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Unhoused Individuals: The unhoused population is critically vulnerable, as they often lack access to safe shelter, clean water, and emergency services. Flooding increases exposure to unsanitary conditions, heightening the risk of disease.
Non-English-Speaking Populations : Language barriers may prevent some residents from receiving timely flood warnings and evacuation instructions, increasing their risk of harm. Targeted outreach and multilingual emergency communications are essential to address these challenges.
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4.2.7 High Wind/Storms
Overall Vulnerability and Impact
Cathedral City is vulnerable to high wind events, particularly Santa Ana winds, which are strong, dry, downslope winds that occur most frequently between October and February. These winds can exceed speeds of 50 to 70 mph and are known to intensify wildfire risks, cause structural damage, and increase airborne dust, reducing air quality. Winter storms and occasional strong convective thunderstorms can also bring high winds, heavy rain, and localized flooding, but the city is not historically impacted by hurricanes or tornadoes. While Cathedral City itself is not designated in a Cal OES high wind hazard zone, the surrounding Coachella Valley is regularly impacted by wind -driven dust storms, especially along corridors such as Varner Road, Interstate 10, and Palm Drive, exacerbating respiratory issues and visibility hazards.
Wind speeds in Cathedral City are typically highest in the northern portions of the city near the foothills and open desert terrain, where gusts exceeding 50 mph have been recorded. Areas such as Varner Road, Mountain View Road, and neighborhoods adjacent to Interstate 10 are particularly exposed. Unsecured structures, construction materials, and lightweight buildings are especially susceptible to wind damage, and power outages are common during strong wind events, sometimes compounded by Public Safety Power Shutoffs (PSPS).
Population
The entire population of Cathedral City is exposed to the hazards associated with high winds and storms. Residents in older homes, mobile home parks (including those along Perez Road, Cathedral Canyon Drive, and East Palm Canyon Drive), and non-retrofitted structures are particularly at risk, as these buildings may not be constructed to current wind-load standards. Airborne dust and debris from windstorms can exacerbate health conditions, particularly for vulnerable populations with respiratory illnesses such as asthma and COPD.
Critical Facilities
Critical facilities such as emergency response centers, fire stations, water treatment plants, and power substations must remain operational during high wind and storm events. Downed power lines, windborne debris, and dust intrusion can disrupt essential s ervices. High winds can also damage cell towers and broadband infrastructure, impeding emergency communication capabilities.
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Water treatment and wastewater facilities may experience service disruptions if power is lost or if windblown debris clogs stormwater drainage systems. The risk of ignition from arcing or downed lines is a major concern during Santa Ana wind events, especi ally in combination with dry vegetation in areas such as Cathedral Canyon Wash and near Flat Top Mountain.
Non-Critical Facilities
Schools, businesses, and industrial properties can experience significant damage during high wind events. Schools may temporarily close due to safety concerns or transportation service disruptions.
Commercial and industrial facilities, especially along Per ez Road, Date Palm Drive, and in north Cathedral City’s light industrial zones, may suffer economic losses from inventory damage, structural impacts, or halted operations.
Mobile homes, temporary structures, and older buildings with inadequate anchoring or roof bracing are at increased risk. Poorly maintained trees or palm fronds, especially in medians and residential areas, may fall and cause property damage or obstruct roads.
Environment
High wind and storm events can have significant environmental consequences, affecting vegetation, air quality, and stormwater management systems.
• Urban Forestry and Vegetation Damage: Strong winds can uproot trees, break limbs, and damage landscaping in parks, street medians, and residential neighborhoods. Tree failure is especially common among non-native ornamental species.
• Airborne Dust and Pollutants: Santa Ana winds are known to carry high levels of PM10 and PM2.5, degrading air quality and triggering air quality warnings. This is especially acute near blowsand-prone areas such as Varner Road, Palm Drive, and the city’s northwestern edge. • Stormwater Runoff and Pollution: Windstorms that coincide with rainfall events can carry significant dust, sediment, and surface contaminants into storm drains, impacting the Whitewater River Channel and Cathedral Canyon Wash.
• Wildfire Risk: High winds rapidly spread embers and flames, especially during dry conditions.
Although Cathedral City is not heavily vegetated, structures near open land or desert terrain - such as along Edom Hill or the western city boundary-remain vulnerable to wind-driven ember ignitions.
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Changes in Development Since Last Approved Plan
Development Trends: Cathedral City has continued to develop commercial and industrial properties, particularly north of Interstate 10. These areas face higher wind exposure due to open terrain and increased structure count. All new development is required to meet California B uilding Code (CBC) wind resistance standards.
Land Use and Zoning: There have been no major zoning changes that significantly alter the city’s exposure to high winds and storms.
Population Shifts: While the city’s total population has remained relatively stable, the percentage of residents over age 65 has increased, elevating health vulnerability to storm-related disruptions such as power loss and poor air quality.
Impacts on Vulnerable Populations
Low-Income Residents: Households with limited financial resources may struggle to afford repairs after wind damage or replace spoiled food during power outages.
Elderly Individuals: Older adults may have difficulty evacuating during extreme weather events, particularly if transportation routes are blocked by debris. Prolonged power outages can also increase health risks for elderly residents reliant on medical equipment.
People with Disabilities: Individuals who rely on electrically powered medical devices, accessible transportation, or in-home care services may face significant health risks if storms cause power outages or transportation disruptions.
Unhoused Individuals: The unhoused population is particularly vulnerable to high wind and storm events, as they often lack access to secure shelter and emergency services. Strong winds can destroy makeshift encampments and increase the likelihood of injuries.
Non-English-Speaking Populations: Language barriers may limit access to emergency alerts and preparedness resources, increasing the risk of delayed response and lack of awareness about storm risks.
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4.2.8 Cyberattack/IT Disruption
Overall Vulnerability and Impact
Cathedral City, like many urban communities, is increasingly vulnerable to cyberattacks and IT disruptions due to its reliance on digital infrastructure to support government operations, emergency services, public utilities, and business activities. A cybe rattack can take many forms, including ransomware, data breaches, distributed denial -of-service (DDoS) attacks, and attacks targeting industrial control systems that manage utilities and transportation networks.
Cyber threats have grown in complexity and frequency, with local governments, financial institutions, healthcare providers, and critical infrastructure operators facing heightened risks. A significant cyberattack could compromise sensitive data, disrupt es sential services, and cause economic and reputational harm to the city. Public sector entities, including law enforcement and emergency response agencies, rely on interconnected digital systems, making them susceptible to coordinated attacks that target 91 1 dispatch systems, public records databases, and real -time traffic management. Power outages, water supply interruptions, and communication failures resulting from a cyberattack could have cascading effects, especially during extreme weather events or ot her concurrent hazards.
Notably, during Tropical Storm Hilary in August 2023, a regional fiber line failure caused a 911 service disruption in Cathedral City, which required emergency calls to be rerouted to administrative lines - highlighting the fragility of critical communications infrastructure during compounding hazards.
Population
The entire population of Cathedral City is exposed to cyberattack risks, particularly as residents and businesses rely on digital communication, financial services, and emergency response systems. The impacts of an IT disruption vary based on the severity and duration of the event. A prolonged outage affecting municipal services could prevent residents from accessing critical information, paying bills, or requesting emergency assistance.
Critical Facilities
Cyberattacks targeting critical facilities can have widespread and severe consequences. Emergency response operations, hospitals, water treatment plants, and power infrastructure rely on digital control systems to maintain functionality and security. A cyberattack could disrupt:
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• 911 and emergency response systems, delaying dispatch services for law enforcement, fire departments, and paramedics.
• Hospital networks, impacting patient records, emergency room operations, and medical equipment reliant on IT infrastructure.
• Water and wastewater treatment facilities, where cyber interference with industrial control systems could lead to contamination, pressure loss, or service failures. Facilities managed by CVWD and DWA are especially critical.
• Electric grid operations, where cyberattacks on smart grid technology or substations operated by Southern California Edison could result in blackouts or power surges, affecting businesses and residences.
Non-Critical Facilities
Non-critical facilities, including businesses, schools, and community centers, are highly dependent on IT infrastructure for daily operations. A cyberattack disrupting internet access, payment processing, or communication networks could significantly impact economic activity and public services.
Retail businesses and financial institutions could experience financial losses if point -of-sale systems, ATMs, or online banking services are disrupted. Manufacturing and logistics operations in Cathedral City-particularly in the Perez Road and north-of-I-10 industrial corridors-which depend on automated systems and real-time inventory tracking, may face significant delays and revenue losses in the event of an IT disruption.
Schools rely on digital learning platforms and online administrative systems, meaning a cyberattack could interrupt education, limit access to student records, and compromise data privacy. Government offices that manage public records, business licenses, a nd utility billing systems could also face operational challenges during an IT disruption.
Environment
Cyberattacks do not directly cause environmental damage, but they can lead to secondary hazards that impact air and water quality, hazardous material containment, and urban sustainability initiatives. A cyberattack targeting industrial facilities or chemic al plants could disable safety monitoring systems, increasing the risk of accidental hazardous material spills or chemical releases. If an attack disrupts water treatment operations, contamination events could occur, posing risks to public health and natural ecosystems-particularly near Cathedral Canyon Wash, the Whitewater River Channel, or areas with underground chemical storage.
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Changes in Development Since Last Approved Plan
Development Trends: Since the last approved hazard mitigation plan, Cathedral City has seen increased digital integration in municipal operations, transportation systems, and public utilities.
Land Use and Zoning: There have been no significant land use changes directly affecting cyberattack vulnerability.
Population Shifts: While the overall population has remained stable, increased remote work and digital dependency have made residents more vulnerable to cyberattacks targeting personal devices, financial institutions, and online government services.
Impacts on Vulnerable Populations
Low-Income Residents: Cyberattacks targeting financial institutions, municipal services, or identity records can disproportionately affect low-income individuals, who may lack resources to recover from financial fraud, delayed benefit payments, or credit disruptions. Limited a ccess to cybersecurity education may further increase their exposure to phishing scams and online fraud.
Elderly Individuals: Older adults may be more susceptible to identity theft, financial scams, and fraudulent activity resulting from data breaches. A cyberattack disrupting healthcare networks or telehealth platforms used by seniors could also limit access to medical care.
People with Disabilities: Individuals with disabilities who rely on assistive technology, telehealth services, or online transportation scheduling may experience severe disruptions if cyberattacks disable digital accessibility tools. Power outages related to cyberattacks could als o impact medical equipment reliant on electricity.
Unhoused Individuals: Many unhoused individuals rely on digital services to access social programs, employment resources, and communication tools. Cyberattacks that disrupt government services or nonprofit organizations could create additional barriers for those seeking assistance.
Non-English-Speaking Populations: Language barriers may limit awareness of cybersecurity threats and response strategies. A cyberattack on emergency alert systems or public information platforms could further reduce access to real-time hazard updates for non-English-speaking residents.
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4.2.9 Infectious Disease/Pandemic
Overall Vulnerability and Impact
Cathedral City is vulnerable to infectious disease outbreaks and pandemics, which can have widespread impacts on public health, the economy, and essential services. The COVID -19 pandemic highlighted the risks associated with global disease transmission, particularly in densely populated urban areas and communities with high levels of industrial and commercial activity.
Infectious diseases can spread through various transmission pathways, including airborne transmission (influenza, COVID-19), vector-borne transmission (West Nile virus, Zika), waterborne contamination (E. coli, norovirus), and direct contact transmission (tuberculosis, hepatitis). The risks associated with infectious disease outbreaks are heightened in locations with high levels of social interaction, such as workplaces, schools, healthcare facilities, and public transportation.
The impacts of an infectious disease outbreak can extend beyond immediate health concerns, affecting economic stability, workforce availability, and public safety. During a pandemic, businesses may experience supply chain disruptions, healthcare systems may become overwhelmed, and public health measures such as quarantines, travel restrictions, and school closures may be necessary. Long -term health consequences, including post -viral complications and increased demand for medical services, can place additional strain on local healthcare infrastructure.
Population
The entire population of Cathedral City is vulnerable to infectious disease outbreaks, though the level of risk varies based on age, health conditions, socioeconomic status, and access to healthcare. Certain populations face heightened risks, including old er adults, individuals with preexisting medical conditions, unhoused individuals, and those without access to adequate healthcare.
High-density housing and workplaces, including the city’s industrial and logistics sectors, can facilitate disease transmission due to close -quarters working conditions and shared facilities. Workers in manufacturing, retail, and food service industries are particularly vulnerable due to frequent in-person interactions. Schools and childcare centers also present high transmission risks due to close -contact environments and the difficulty of enforcing social distancing measures.
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A pandemic can have psychological and emotional impacts on residents, increasing stress, anxiety, and social isolation. Mental health effects may persist long after the initial outbreak, requiring expanded behavioral health services and community support programs.
Critical Facilities
Hospitals and urgent care centers serving Cathedral City-most notably Eisenhower Health and regional urgent care clinics-must maintain surge capacity and continuity of operations during infectious disease events. A shortage of healthcare workers, PPE, or c ritical supplies could impair their ability to treat patients with infectious and non-infectious conditions alike.
Emergency responders from Cathedral City Fire Department and Police Department must operate under elevated health precautions, with reduced staffing or quarantine protocols impacting response capability. Cathedral City successfully implemented modified res ponse models during the COVID-19 emergency to reduce exposures.
Essential utilities such as wastewater systems operated by CVWD or DWA, and energy distribution from Southern California Edison, must also remain functional despite potential staffing shortfalls.
SCADA-managed infrastructure systems are particularly vulner able during concurrent cybersecurity or staffing crises.
Non-Critical Facilities
Non-critical facilities, including businesses, educational institutions, and recreational centers, can experience significant disruptions during an infectious disease outbreak. Schools may be required to close or transition to remote learning, creating cha llenges for students, parents, and educators.
Businesses, particularly those in the retail, hospitality, and entertainment industries, may experience revenue losses due to reduced customer demand and workforce shortages.
Environment
Infectious disease outbreaks can have both direct and indirect environmental impacts. The increased use of medical supplies, including personal protective equipment (PPE), can contribute to waste management challenges. Disposal of contaminated materials, s uch as masks, gloves, and testing kits, must be carefully managed to prevent environmental contamination.
During pandemics, public health measures such as sanitation efforts, disinfection procedures, and air filtration improvements may be implemented to reduce disease spread. While these measures help protect public health, they may also lead to increased ener gy consumption and chemical runoff from disinfectants entering local waterways.
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Changes in Development Since Last Approved Plan
Development Trends: Since the last hazard mitigation plan, there has been a heightened awareness of the need for pandemic preparedness in urban planning and infrastructure development.
Land Use and Zoning: No major land use changes have directly influenced infectious disease vulnerability.
Population Shifts: While Cathedral City’s overall population has remained stable, demographic trends indicate an increasing number of older adults who may require specialized healthcare services during disease outbreaks.
Impacts on Vulnerable Populations
Low-Income Residents: Low-income individuals may face barriers to accessing healthcare, testing, and vaccinations during an infectious disease outbreak. They are also more likely to work in industries that require in-person labor, increasing their exposure risks. Financial hardships due to job losses or medical expenses can further exacerbate economic instability.
Elderly Individuals: Older adults are particularly vulnerable to severe illness and complications from infectious diseases. Long-term care facilities and assisted living communities may experience outbreaks with high mortality rates if proper infection control measures are no t maintained. Limited mobility may also prevent older residents from accessing medical care and essential supplies.
People with Disabilities: Individuals with disabilities may face heightened risks during pandemics due to reliance on caregivers, medical equipment, and specialized healthcare services. Transportation limitations, disrupted medical supply chains, and difficulties in accessing public health information can further increase their vulnerability.
Unhoused Individuals: Unhoused populations are at extreme risk during infectious disease outbreaks due to lack of access to sanitation, healthcare, and stable shelter. Congregate living settings, such as homeless shelters, may facilitate disease transmission, requiring enhanced infection control measures.
Outreach programs and emergency housing initiatives play a critical role in protecting this population during pandemics.
Non-English-Speaking Populations: Language barriers may prevent some residents from receiving timely public health information, accessing healthcare services, and understanding emergency directives. Culturally competent outreach efforts and multilingual public health campaigns are essential to ensuring equitable access to disease prevention and treatment resources.
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4.2.10 Landslides
Overall Vulnerability and Impact
Cathedral City is susceptible to landslides and rockfalls, primarily in areas adjacent to the Santa Rosa Mountains and Indio Hills. The region’s geologic composition, including crystalline bedrock and fractured metamorphic and granitic units, presents natural planes of weakness-such as joints and fault zones-that increase slope instability. Areas with loose or unconsolidated alluvial soils on steep inclines, particularly near the Cove neighborhood, Edom Hill, and hillside developments west of Cathedral Canyon Drive, face elevated risk during periods of intense precipitation or seismic activity.
Seismically induced landslides pose a moderate to high risk due to proximity to the San Andreas, Banning, and San Jacinto fault zones. Strong ground shaking during a major seismic event may destabilize steep slopes such as those surrounding East Palm Canyo n Drive, resulting in rockfalls and debris flows. Human activity -including grading for hillside development or infrastructure -may exacerbate instability in these zones.
The primary impacts of landslides include roadway obstructions, damage to hillside residences, and utility disruption. Debris flows may affect key arterial routes such as Cathedral Canyon Drive, Date Palm Drive south of the wash, and adjacent canyon roads. Infrastructure, including sewer force mains and electrical lines crossing hillside areas, may sustain damage or require costly stabilization measures.
Population
The entire population of Cathedral City is exposed to indirect impacts from landslides, though those in proximity to steep terrain-especially in the Cove, Panorama, and neighborhoods bordering the Santa Rosa Mountains-face greater physical and economic risk. Slope failures may isolate neighborhoods by cutting off access routes or damaging water, power, or communication lines.
Critical Facilities
Landslides threaten the operability of critical facilities if they impact access routes or infrastructure support systems. Cathedral City Fire Station 411 on Date Palm Drive and emergency service staging areas must maintain clear access via ridge -adjacent corridors. A landslide blocking Cathedral Canyon Drive or the adjacent wash crossings could delay emergency response to the southern portion of the city.
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Water and wastewater systems operated by CVWD are at risk where force mains cross vulnerable slopes. Breakage due to slope movement could lead to service interruption, wastewater spills, or contamination. Similarly, above -ground and buried electrical infra structure-particularly lines descending from Flat Top Mountain-may be affected by ground displacement or rockfalls.
Non-Critical Facilities
Non-critical facilities, including schools, businesses, and residential structures, may experience structural damage or access limitations due to landslides. Schools and community centers located near steep terrain may need to implement mitigation measures such as slope stabilization, retaining walls, or early warning systems to ensure safety.
Industrial and commercial properties with large outdoor storage areas may be vulnerable to debris accumulation or structural damage if located in or near landslide -prone zones. Landslides affecting major transportation routes can also disrupt supply chains and economic activity, leading to business closures or financial losses.
Residential properties in hillside areas face the greatest direct risks from landslides. Homes built on or near unstable slopes may experience foundation damage, structural failure, or property loss due to slope movements. Homeowners without landslide insu rance may face significant financial burdens in the aftermath of an event.
Environment
Landslides can cause lasting environmental damage by altering natural drainage patterns, increasing soil erosion, and disrupting ecosystems. The loss of vegetation due to slope failures can accelerate erosion and sedimentation in local waterways, impacting water quality and aquatic habitats.
Key environmental consequences of landslides include:
• Soil Erosion and Sedimentation: Landslides transport sediment into storm drain infrastructure, the Cathedral Canyon Wash, and the Whitewater River Channel, reducing flood-carrying capacity and increasing downstream flood risk. • Habitat Disruption: Vegetation loss in the Santa Rosa foothills or along Edom Hill exposes sensitive desert ecosystems and undermines slope stability. • Airborne Dust and Debris: Landslide events can generate significant dust, affecting air quality and exacerbating respiratory issues for vulnerable populations.
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Changes in Development Since Last Approved Plan
Development Trends: Several new developments have been approved near slope -adjacent areas, including hillside subdivisions and infrastructure improvements. These are subject to geotechnical review and slope stabilization standards per city ordinance.
Land Use and Zoning: No major zoning changes have significantly altered the city’s exposure to landslides. However, updated building regulations may have been implemented to improve slope stabilization requirements in at-risk areas.
Population Shifts: While Cathedral City’s overall population growth has been steady, an increase in older adult residents may heighten vulnerabilities related to landslide evacuations and post -disaster recovery efforts.
Impacts on Vulnerable Populations
Low-Income Residents: Households with limited financial resources may struggle to repair landslide damage or relocate to safer areas. Insurance coverage for landslide damage is often limited, making recovery efforts more challenging.
Elderly Individuals: Older adults may have difficulty evacuating from landslide -prone areas, particularly if roads are blocked or transportation options are limited. They may also be more susceptible to health risks associated with landslide-related disruptions.
People with Disabilities: Individuals with mobility impairments or medical conditions may face significant challenges during a landslide event, especially if access to emergency services is disrupted.
Unhoused Individuals: The unhoused population is particularly vulnerable to landslides, as they often reside in areas with unstable terrain and lack access to safe shelter. Landslides can destroy makeshift encampments and increase exposure to hazardous conditions.
Non-English-Speaking Populations: Language barriers may limit access to landslide preparedness information and emergency alerts. Multilingual communication strategies are essential for ensuring that all residents receive timely warnings and evacuation instructions.
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4.2.11 Sandstorms (Haboob and Blowsand)
Overall Vulnerability and Impact
Cathedral City is highly vulnerable to sandstorm -related disruptions due to its geographic location along the northern edge of the Coachella Valley, where strong, sustained winds frequently transport sand and fine particulate matter from the west. Blowsand and haboobs reduce visibility, disrupt transportation and utilities, and create serious health hazards, particularly for people with respiratory or cardiovascular conditions.
Blowsand accumulations can impede access to critical roads, clog storm drains, damage mechanical systems, and require frequent clean-up and maintenance. Haboob events-sudden dust storms generated by strong downdrafts-can create extreme driving hazards, limit visibility to near-zero conditions, and produce wind gusts exceeding 60 mph. According to NOAA’s Storm Events Database, haboobs in the region have been observed with gusts above 70 mph, most recently recorded in Riverside County in 2022. The area near V arner Road, Date Palm Drive, and east of the Whitewater River Channel is particularly susceptible due to its topography, wind channeling effects, and proximity to undeveloped desert terrain.
In addition to safety impacts, sandstorms can accelerate wear on infrastructure and increase costs for municipal operations. Frequent cleanup of sediment from medians, storm drains, and intersections creates an ongoing burden on Public Works and Streets Ma intenance. Fine particulate matter (PM10 and PM2.5) concentrations during sandstorms often exceed state and federal air quality thresholds, triggering South Coast AQMD health alerts.
Population
The entire population of Cathedral City is exposed to sandstorm risks, but outdoor workers, children, elderly individuals, and people with pre -existing respiratory or cardiovascular conditions are particularly vulnerable. The presence of mobile home communities and workforce housing near open desert areas increases exposure to airborne particulates and windborne debris. Pedestrian and transit - dependent residents are also disproportionately affected due to direct exposure during routine activities.
Critical Facilities
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Critical facilities in sandstorm -prone areas face functional disruption during low -visibility or high - wind events. Emergency response times may be slowed by poor roadway visibility and debris accumulation, especially on routes like Varner Road, Vista Chino , and Date Palm Drive. Emergency Operations Center (EOC) operations may be challenged by power outages caused
by sand intrusion into HVAC and mechanical systems, particularly for facilities without sealed intakes or HEPA -grade filtration. Medical facilities and shelter sites may see increased demand from individuals suffering from asthma, COPD, or particulate -induced cardiovascular events during major blowsand days. Electrical substations and solar arrays, particularly those near the eastern edges of the city or open desert tracts, are exposed to sand abrasion, panel inefficiency, and maintenance needs.
Non-Critical Facilities
Sandstorm impacts to non-critical facilities include operational disruptions to schools, small businesses, and transit infrastructure. Schools, particularly those with aging HVAC systems or poor sealing, may be forced to suspend classes due to air quality or poor visibility, limiting educational continuity. Small businesses, especially auto repair shops and construction contractors operating outdoors, often experience productivity losses due to equipment damage and unsafe working conditions. Public transit stops without sheltering canopies along Cathedral Canyon Drive and Dinah Shore Drive offer little protection for waiting passengers during haboob conditions. Parks and recreational areas, particularly in the northern and eastern parts of the city, often require temporary closures and post-event cleanup.
Environment
While sandstorms are not directly toxic to the environment, they significantly impact air quality and exacerbate erosion. They contribute to violations of ambient air quality standards for PM10, which are linked to public health outcomes and regulatory com pliance. Sandstorms also strip topsoil and destabilize vegetative buffers, increasing susceptibility to flooding and fire ignition. They obstruct stormwater infrastructure and natural wash conveyance with sediment deposition, decreasing floodwater capacity . Vegetation loss in sandstorm -prone areas also limits urban cooling and heat resilience, compounding risks during concurrent extreme heat days.
Changes in Development Since Last Approved Plan
Development Trends: Since the prior LHMP, development in eastern Cathedral City, particularly near Rio Vista Village and the Varner Road corridor, has increased exposure to sandstorm-prone zones. New Local Hazard Mitigation Plan Update
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homes, schools, and industrial facilities have been constructed near previously undeveloped desert areas, elevating vulnerability to windblown sand intrusions.
Land Use and Zoning: There has been some expansion of land use in blowsand corridors, without full implementation of vegetative buffers or windbreaks. Coordination with regional planning and the CVAG Blowsand Mitigation Program remains limited.
Population Shifts: Population growth east of Date Palm Drive and along the I -10 corridor has introduced more residents to high-risk sand deposition areas, including communities less likely to have access to air filtration, cooling infrastructure, or vehicle protection.
Impacts on Vulnerable Populations
Low-Income Residents: May lack access to air conditioning or filtered air during sandstorm events and may be more reliant on walking or transit during hazardous air conditions.
Elderly Individuals: Are at higher risk of respiratory distress and hospitalizations triggered by airborne particulate concentrations.
People with Disabilities: May face challenges evacuating or accessing clean indoor environments if reliant on ventilators or other electronic medical equipment.
Unhoused Individuals: Face direct exposure to wind and particulate matter with little access to shelters during haboobs.
Non-English-Speaking Populations: May not receive timely air quality warnings or visibility alerts, increasing risk of outdoor exposure and traffic-related accidents.
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4.2.12 Transportation-Related Disruptions
Overall Vulnerability and Impact
Cathedral City faces increasing vulnerability to transportation -related disruptions due to its reliance on a limited number of regional roadway, rail, and air corridors that are susceptible to natural and human-caused hazards. The city is bisected by major arterial roadways, including East Palm Canyon Drive (CA-111), Date Palm Drive, and Dinah Shore Drive, and lies directly adjacent to Interstate 10 (I- 10), a primary transcontinental freight and evacuation route. Additionally, the Union Pacific Railroad corridor and proximity to Palm Springs International Airport (PSP) create risk exposure to rail and air service disruptions, derailments, and crash hazards.
Flooding, earthquakes, windstorms, or wildfires can render key arterial routes impassable, as occurred during Tropical Storm Hilary in August 2023, when flooding closed multiple I -10 exits and left Cathedral City partially isolated. Mudflows and debris dep osits blocked major access points between Palm Springs and Palm Desert, highlighting the lack of redundant evacuation routes. Train derailments on the Union Pacific line-which carries up to 100 trains daily between Colton and Yuma-pose potential chemical spill, fire, or explosion risks to adjacent neighborhoods. Similarly, increasing air traffic at Palm Springs International Airport raises long -term risk of aviation incidents, particularly during extreme weather or mechanical failure events.
Transportation disruptions threaten emergency response, evacuations, supply chain continuity, and public mobility. The absence of reliable alternative routes or mass transit redundancy increases the city's sensitivity to single-point transportation failures. As projected growth in both airport traffic and regional freight volumes continues, Cathedral City’s exposure to compounding impacts from concurrent hazards and infrastructure failure is expected to intensify.
Population
All residents of Cathedral City are exposed to transportation -related disruption risks, with disproportionate impacts on transit -dependent populations, elderly individuals, and those with mobility or medical access needs. During road closures or system out ages, residents may be unable to access employment, healthcare, or emergency services, particularly in neighborhoods dependent on a small number of entry or exit points. During Tropical Storm Hilary, emergency access to and from some subdivisions was restricted for hours due to blocked crossings and detoured arterials.
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Critical Facilities
Transportation-related disruptions can severely impair the functioning of critical facilities that rely on continuous accessibility and logistical supply. Emergency services, including the Cathedral City Fire Department and Police Department, require unimp eded road access for emergency response and mutual aid operations. Facilities located near vulnerable infrastructure-such as fire stations adjacent to the Whitewater River channel or flood -prone roadways-face greater risk of isolation during high - impact events. Ambulance and medical transport to regional hospitals may be delayed or rerouted if major corridors are blocked. The city’s Emergency Operations Center (EOC) at the Civic Center Complex also depends on reliable access for continuity of operations.
Rail and airport disruptions pose risks to facilities located near the Union Pacific corridor and PSP airspace. The increasing volume of PSP traffic -projected to double from 3.2 million to over 6 million passengers by 2042 -means that delays, diversions, or aviation incidents could disrupt supply chains, emergency evacuations, and critical goods movement during regional crises.
Non-Critical Facilities
Non-critical facilities such as schools, commercial centers, and municipal buildings also face operational and economic disruptions during transportation outages. School closures or early dismissals may be required if bus access is obstructed or pedestrian routes are deemed unsafe. Businesses in the Perez Road industrial corridor and North City commercial zones rely on just-in-time delivery systems that are vulnerable to I -10 and rail service interruptions. Retail and tourism -oriented businesses may suffer revenue losses when airport or roadway access is delayed due to storm or accident -related closures.
Public transit users experience the most immediate effects of transportation system failures. Cathedral City residents who rely on SunLine Transit Agency services may be unable to reach jobs, schools, or medical appointments when flooding, road hazards, or driver shortages halt routes or delay service.
The city’s limited paratransit capacity exacerbates access challenges for people with disabilities or without vehicles.
Environment
Transportation disruptions can contribute to environmental harm in several ways. Train derailments involving hazardous materials could result in spills or fires affecting air and water quality, particularly near wash channels or groundwater basins. Flood-related transportation failures may involve roadway Local Hazard Mitigation Plan Update
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erosion, sedimentation into local washes, and uncontained oil, fuel, or brake fluid runoff into storm drains. Prolonged idling during road closures increases greenhouse gas and particulate emissions, further exacerbating local air quality issues. Repeated closures or detours on unpaved or low - maintenance routes may accelerate land degradation and impact habitat areas adjacent to traffic corridors.
Changes in Development Since Last Approved Plan
Development Trends: New residential and commercial development north of I -10 and east of Date Palm Drive has increased demand for reliable roadway access. Industrial growth in the Perez Road corridor and the Dinah Shore Drive commercial spine has added vehicle volume to alre ady strained corridors.
Land Use and Zoning: Expansion near the Union Pacific rail line and I-10 has increased the number of structures and population potentially impacted by rail or roadway incidents. Some zoning designations have allowed development within potential impact buffers of the airport and rail line without requiring risk mitigation features.
Population Shifts: Demographic growth in neighborhoods lacking redundant ingress/egress routes - such as the Panorama, Dream Homes, and Rio Vista areas-has heightened transportation vulnerability during flooding or seismic events.
Impacts on Vulnerable Populations
Low-Income Residents: Residents without private vehicles rely more heavily on transit systems that are highly vulnerable to disruption. Limited income also reduces flexibility to use alternatives like rideshare services during outages.
Elderly Individuals: Seniors may require consistent access to healthcare or prescription delivery, which may be interrupted if roadways are impassable or transit is suspended.
People with Disabilities: Those requiring wheelchair -accessible transit or paratransit services may become isolated during extended disruptions or during storm-related service outages.
Unhoused Individuals: May be forced to shelter in hazardous roadside areas or be stranded without access to services if roads are closed or transit stops are inaccessible.
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Non-English-Speaking Populations: May not receive timely updates on transit rerouting, emergency closures, or detours if communications are not multilingual or culturally accessible.
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4.3 Critical Infrastructure & Key Resources
Lifelines
FEMA's Lifelines are a framework for identifying and prioritizing critical infrastructure and services that are essential to the functioning of communities during and after a disaster. The Lifelines framework was developed by the Federal Emergency Management Agency (FEMA) to help emergency managers and first responders prioritize their response efforts and allocate resources during a disaster.
The concept of Lifelines emerged from the realization that disasters can have wide-ranging impacts on a community’s infrastructure and services, and that disruptions to these critical systems can significantly hinder response and recovery efforts. The Lifelines framework was developed to identify these critical systems and services and prioritize them based on their importance to overall community functioning and resilience.
There are eight FEMA Lifelines, each of which represents a critical area of infrastructure or service. Critical facilities are categorized under the following lifelines:
• Safety and Security: This includes law enforcement/security, search and rescue, fire services, government service, and responder safety.
• Food, Water, and Shelter: This encompasses evacuations, schools, food/potable water, shelter, durable goods, water infrastructure, and agriculture.
• Health and Medical: This lifeline involves medical care (hospitals), patient movement, public health, fatality management, health care, and supply chain. • Energy: Power (grid), temporary power, and fuel.
• Communications: This includes infrastructure, alerts, warnings, messages, 911 and dispatch, responder communications, and financial services.
• Transportation: This encompasses highway/roadway, mass transit, railway, aviation, and pipeline.
• Hazardous Materials: This includes facilities, hazardous debris, pollutants, and contaminants. • Water Systems: This includes potable water infrastructure and wastewater management.
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The Lifelines framework is designed to help emergency managers and first responders prioritize their response efforts and allocate resources based on the criticality of each Lifeline. By prioritizing the most critical Lifelines, emergency responders can work to restore essential services and infrastructure more quickly, which can help to speed up the overall recovery process and reduce the impact of the disaster on the community.
Inventory of Critical Facilities
Critical facilities are essential to the response, recovery, and overall resilience of the City of Cathedral City. These facilities include emergency response centers, public infrastructure, transportation hubs, utilities, and community service buildings that support essential operations. Identifying and assessing these facilities' vulnerabilities is a key component of hazard mitigation planning to ensure continued functionality before, during, and after disaster events.
The following table lists all critical facilities within Cathedral City, along with their addresses and functions.
Facility Name Address Function FEMA Lifeline
City Hall 68700 Avenida Lalo Guerrero,
Cathedral City, CA 92234
Government administration and emergency
coordination Safety and Security
Council Chambers 68700 Avenida Lalo Guerrero,
Cathedral City, CA 92234
Venue for city council meetings and public
forums Safety and Security
Fire Station 411 68-950 Buddy Rogers Avenue,
Cathedral City, CA 92234
Fire suppression and emergency medical
services Safety and Security
Fire Station 412 – Headquarters/EOC 32100 Desert Vista Rd., Cathedral City, CA 92234
Fire suppression, emergency medical
services, and administrative headquarters Safety and Security Fire Station 413 27610 Landau Blvd., Cathedral
City, CA 92234
Fire suppression and emergency medical
services Safety and Security
Police Department 68700 Avenida Lalo Guerrero,
Cathedral City, CA 92234
Law enforcement and public safety
operations Safety and Security
Public Works 68385 Kieley Road, Cathedral
City, CA 92234
Public infrastructure maintenance and
emergency response support Transportation
Canyon Springs Healthcare Facility 69696 Ramon Road, Cathedral City, CA 92234
Healthcare services for individuals with
developmental disabilities Health and Medical
Cathedral City Public Library 33520 Date Palm Drive, Cathedral City, CA 92234
Public library and community resource
center
Food, Water,
Shelter
Cathedral City Senior Center
37171 West Buddy Rogers
Avenue, Cathedral City, CA
92234
Senior services and community programs Food, Water,
Shelter
Agua Caliente Elementary School 30800 San Luis Rey Drive, Cathedral City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
Cathedral City Elementary School 69300 Converse Road, Cathedral City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
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Facility Name Address Function FEMA Lifeline
Landau Elementary School 30310 Landau Blvd., Cathedral
City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
Rio Vista Elementary School 67-700 Verona Road, Cathedral City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
Sunny Sands Elementary School 69-310 McCallum Way, Cathedral City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
Nellie N. Coffman Middle School 34-603 Plumley Road, Cathedral City, CA 92234
Education services and emergency shelter
capability
Food, Water,
Shelter
James Workman Middle School 69-300 30th Avenue,
Cathedral City, CA 92234
Education services and emergency
shelter capability
Food, Water,
Shelter
Cathedral City High School 69250 Dinah Shore Drive,
Cathedral City, CA 92234
Education services and emergency
shelter capability
Food, Water,
Shelter
Mount San Jacinto High School 30800 Landau Blvd.,
Cathedral City, CA 92234
Continuation education services and
emergency shelter capability
Food, Water,
Shelter
Eisenhower Medical Center 39000 Bob Hope Drive,
Rancho Mirage, CA 92270
Regional hospital providing
comprehensive medical services
Health and
Medical
Desert Regional Medical Center 1150 N Indian Canyon Drive, Palm Springs, CA 92262
Regional hospital providing
comprehensive medical services
Health and
Medical
John F. Kennedy Memorial
Hospital
47111 Monroe St, Indio, CA
92201
Regional hospital providing
comprehensive medical services
Health and
Medical
Southern California Edison
Substations
Various locations within
Cathedral City
Electrical power distribution and grid
stability Energy
Frontier Communications
Switching Stations
Various locations within
Cathedral City
Telecommunications and emergency
communication infrastructure Communications
Spectrum Fiber Switching
Facilities
Various locations within
Cathedral City Fiber communications infrastructure Communications Cathedral City Amphitheater 68526 Avenida Lalo Guerrero, Cathedral City, CA 92234
Outdoor venue suitable for public
gatherings or emergency staging
Safety and
Security
Cathedral City Boys and Girls
Club
32141 Whispering Palms
Trail, Cathedral City, CA
92234
Youth services, gymnasium, and
community support programming
Safety and
Security
SoCal Gas Facilities Various locations within
Cathedral City
Natural gas infrastructure, transmission
and distribution Energy
Cathedral City Public Parks
(Desert Rec Management)
Multiple park facilities
citywide
Public recreational areas and potential
shelter or cooling center functions
Food, Water,
Shelter
Coachella Valley Water District 75525 Hovley Ln. E., Palm Desert
Water infrastructure and supply
management
Water
Riverside County Emergency
Operations Center 4080 Lemon Street Regional coordination hub for emergency response
Safety and
Security
Esperanza Park
Dinah Shore Dr. and Avenida
La Paloma, Cathedral City,
CA 92234
Public recreation, potential shelter site
managed by Desert Recreation District
Food, Water,
Shelter
Desert Water Agency 1200 S. Gene Autry Trail,
Palm Springs, CA 92264
Regional water supply and
infrastructure management Water
Cathedral City EOC Fire
Administration Offices
68950 Buddy Rogers Avenue,
Cathedral City, CA 92234
Local hub for emergency coordination
and response
Safety and
Security
Riverside County Flood Control
and Water Conservation District
1995 Market Street, Riverside,
CA 92501
Regional flood control and stormwater
infrastructure management Water
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Note: Some facilities, such as utility substations and switching stations, have multiple locations within Cathedral City. Specific addresses are not publicly disclosed for security reasons.
Transportation and Supply Chain Vulnerabilities
Cathedral City serves as a critical transportation and supply chain link within the Coachella Valley and the broader Southern California region. Located along key transportation corridors, the city provides access to major highways and arterial roads that support the movement of goods, residents, and emergency response vehicles. However, this infrastructure is vulnerable to various hazards, including earthquakes, extreme heat, flooding, high winds, hazardous material spills, and cyberattacks targeting transportation logistics and supply chain management.
The city’s transportation network includes Interstate 10 (I -10), a major east-west route that connects the Coachella Valley to Los Angeles, Arizona, and beyond. State Route 111 (SR -111) serves as a key commercial and commuter route, linking Cathedral City with Palm Springs, Rancho Mirage, and other valley cities. Additionally, Gene Autry Trail, Date Palm Drive, Landau Boulevard, and Palm Drive are crucial north-south connectors that facilitate local and regional mobility. These roadways are essential for daily commerce, emergency response, and public transit, yet they remain susceptible to damage from seismic activity, storm-related flooding, and excessive heat-induced pavement degradation.
Supply chain vulnerabilities are of particular concern due to Cathedral City’s concentration of commercial, retail, and light industrial facilities, particularly within the industrial corridors along Perez Road, Ramon Road, and Date Palm Drive. The region depends on a steady flow of goods, particularly for food distribution, fuel supply, medical resources, and construction materials. Disruptions to major transportation routes, including I-10, could significantly impact local businesses, lead to shortages, and delay emergency services. Power outages, often triggered by extreme heat, windstorms, or Public Safety Power Shutoffs (PSPS), can interfere with fuel availability at gas stations and interrupt cold chain logistics, further exacerbating transportation and supply chain challenges.
The table below provides a comprehensive list of transportation and supply chain facilities. Each facility is categorized by its function and FEMA lifeline designation.
Facility Name Address Function FEMA
Lifeline
Interstate 10 (I-10) N/A Major east-west highway corridor Transportation East Palm Canyon Drive (SR-
111) N/A Primary commercial and commuter route Transportation Gene Autry Trail N/A North-south regional connector Transportation Date Palm Drive N/A North-south connector for local and regional traffic Transportation Palm Drive N/A Key access route between Desert Hot Springs and I-10 Transportation Varner Road NA Alternate to I-10 interchange Transportation Local Hazard Mitigation Plan Update
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Facility Name Address Function FEMA
Lifeline
Cathedral City Public Works
Yard 68385 Kieley Road Public infrastructure maintenance Transportation SunLine Transit Facility 32-505 Harry Oliver
Trail Public transit operations and emergency transport Transportation Palm Springs International
Airport
3400 E Tahquitz
Canyon Way Nearest regional airport Transportation
Union Pacific Railroad
Corridor N/A Freight rail service connecting the Coachella Valley Transportation Cathedral City Fueling
Stations Various Locations Fuel supply for commercial and emergency vehicles Energy
Palm Springs Unified School
District Transportation Yard
150 District Center
Drive, Palm Springs,
CA 92264
School bus fleet maintenance and student transport
services
Transportation
State Route 74 (SR-74 /
Pines to Palms Highway)
N/A Mountain corridor linking I-5 in Orange County to
Coachella Valley via Palm Desert; potential
alternative evacuation and supply route
Transportation
Potential Transportation Disruptions and Vulnerabilities Several hazards pose a risk to Cathedral City’s transportation and supply chain networks, including:
• Earthquakes: Seismic events can cause roadway damage, bridge collapses, and temporary highway closures, limiting access for emergency response and supply deliveries. • Flooding: Heavy rain events, often exacerbated by undersized or overwhelmed stormwater infrastructure, can lead to localized road closures, particularly in low -lying intersections.
Heavy rain events, within or outside the city can also transport mud and debris into the city as was the case with the August 2023 Tropical Storm Hilary Event. The damaging mudflows transported rainfall, mud and debris from over 20 miles northwest to a city neighborhood. • Extreme Heat: Prolonged high temperatures can degrade road surfaces, increasing the likelihood of pavement buckling and vehicle overheating incidents. • High Winds: Santa Ana winds can lead to roadway obstructions from downed trees, power lines, and debris, delaying emergency response and disrupting supply chain operations • Cyberattacks: Given the increasing reliance on digital logistics, a cyberattack targeting transportation management systems, fuel distribution networks, or traffic signal infrastructure could disrupt Cathedral City’s supply chain and emergency mobility.
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SECTION 5 – CAPABILITY ASSESSMENT
Element C: Mitigation Strategy Requirements
C1. Does the plan document each jurisdiction’s existing authorities, policies, programs and resources and its ability to expand on and improve these existing policies and programs? (Requirement 44 CFR § 201.6(c)(3))
C2. Does the plan address each jurisdiction’s participation in the NFIP and continued compliance with NFIP requirements, as appropriate? (Requirement 44 CFR § 201.6(c)(3)(ii))
5.1 Planning & Regulatory Capabilities
Existing Local Plans, Policies, and Regulatory Framework Cathedral City has a well -established set of plans, policies, and regulations that contribute to hazard mitigation and resilience. These include the General Plan and various zoning and regulatory codes. The following table provides an overview of key local plans that address hazard mitigation, land use planning, and community resilience.
Plan/Document Purpose and Relevance to Hazard Mitigation Latest Update Cathedral City General Plan
Provides long-term guidance on land use, housing, transportation, and environmental planning. Includes the Safety Element, Land Use Element, and Conservation and Open Space Element, all of which integrate hazard mitigation policies.
2024
General Plan Safety Element
Establishes policies for reducing risks from earthquakes, wildfires, extreme heat, air quality hazards, and hazardous materials. Aligns with California’s State Hazard Mitigation Plan (SHMP) and AB 2140 requirements for local hazard mitigation integration.
2024
General Plan Land Use Element
Regulates land use to ensure that development is compatible with hazard- prone areas. Guides industrial, commercial, and residential development with hazard resilience considerations.
2024
General Plan Conservation and
Open Space Element
Addresses environmental conservation, air quality, and energy efficiency, supporting climate adaptation strategies and hazard mitigation goals. 2024 General Plan Circulation Element
Plans for resilient transportation infrastructure, incorporating evacuation routes, transit accessibility, and multi-modal transportation strategies for emergency response.
2024
General Plan Housing Element
Ensures adequate housing supply while integrating climate resilience strategies, flood risk reduction measures, and emergency preparedness policies in housing developments.
2024
Environmental Justice Element
Identifies disadvantaged communities most impacted by hazards and outlines equity-focused strategies to enhance resilience, emergency preparedness, and access to resources.
2024
Cathedral City Local Hazard
Mitigation Plan (LHMP)
Identifies hazard risks, vulnerabilities, and mitigation strategies specific to Cathedral City. Ensures compliance with FEMA’s Disaster Mitigation Act of 2000.
2018 (Update in Progress)
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Plan/Document Purpose and Relevance to Hazard Mitigation Latest Update California State Hazard
Mitigation Plan (SHMP)
Provides statewide hazard mitigation goals and serves as a guiding document for local hazard mitigation planning. 2023
Zoning Code & Development
Regulations
Establishes building and land use regulations that integrate hazard mitigation measures such as floodplain management, seismic safety, fire protection standards, and defensible space requirements.
Ongoing Undergoing a
complete update – est.
completion 2026
Cathedral City Climate Action
Plan
Aligns with California’s climate goals and includes mitigation strategies for extreme heat, flooding, and emissions reduction. 2013 SCAG Regional Transportation
Plan/Sustainable Communities
Strategy (RTP/SCS)
Outlines transportation and sustainability initiatives that impact Cathedral City, including greenhouse gas reduction, transit- oriented development, and emergency evacuation routes.
2024
Cathedral City Emergency
Operations Plan (EOP)
Establishes emergency preparedness, response, and recovery efforts, including hazard-specific protocols for earthquakes, floods, extreme heat, and hazardous materials incidents.
Ongoing (Update in
Progress)
Cathedral City Floodplain
Management Program
Ensures compliance with the National Flood Insurance Program (NFIP) and regulates development in flood-prone areas.
Implements flood risk reduction strategies.
Ongoing
Stormwater Management &
Urban Runoff Plan
Implements Best Management Practices (BMPs) to reduce flood risks, improve water quality, and enhance stormwater retention capacity.
Ongoing
Cathedral City Capital
Improvement Program (CIP)
Prioritizes infrastructure investments to enhance resilience, including seismic retrofits, drainage improvements,
transportation resilience projects, and emergency facility upgrades.
Biannual Update
CVAG Coachella Valley
Flooding and Blowsand Risk
Study
Assesses regional flooding and windblown sand hazards across the Coachella Valley. Identifies at-risk transportation corridors and informs local mitigation planning, including for Cathedral City.
2021
CVAG Varner Road/I-10
Emergency Bypass Study
Evaluates emergency access and bypass potential for Interstate 10 via Varner Road. Supports transportation resilience and emergency evacuation capabilities.
2022
Cathedral City General Plan and Key Elements
The Cathedral City General Plan serves as the city’s long-term blueprint for growth, development, and resilience. It establishes policies that guide land use, infrastructure planning, environmental protection, and hazard mitigation. The Safety Element, a key component of the General Plan, specifically addresses disaster preparedness, hazard mitigation, and climate resilience, ensuring that Cathedral City remains compliant with FEMA guidelines and the California State Hazard Mitigation Plan (SHMP).
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Other elements of the General Plan also incorporate hazard mitigation principles:
• The Safety Element (2024) aligns with FEMA, the SHMP, and the California Climate Adaptation Strategy, integrating policies that address earthquakes, flooding, extreme heat, wildfire risks, air quality, hazardous materials incidents, and emergency response coordination. • The Land Use Element ensures zoning and development decisions account for natural hazards, guiding growth to reduce exposure to high -risk areas such as flood zones and seismic fault zones.
• The Conservation and Open Space Element promotes urban greening, stormwater management, water conservation, and air quality improvements, supporting climate adaptation efforts.
• The Circulation Element includes evacuation planning, emergency transportation strategies, and critical infrastructure resilience measures to enhance public safety and mobility during disasters.
Local Hazard Mitigation Planning
Prior to the current update, Cathedral City adopted its most recent Local Hazard Mitigation Plan (LHMP) in 2017, providing a comprehensive risk assessment and mitigation strategy for earthquakes, floods, wildfires, hazardous materials incidents, extreme heat, and other hazards. The city is currently in the process of updating the LHMP to ensure continued compliance with FEMA’s Disaster Mitigation Act of 2000 and to align with the 2023 California State Hazard Mitigation Plan.
Additionally, Cathedral City participates in the Riverside County Multi -Jurisdictional Local Hazard Mitigation Plan (MJHMP) (2023), which facilitates regional coordination on disaster response and mitigation efforts.
Zoning Code and Development Regulations
The City’s zoning code regulates land use and development to reduce exposure to hazards. Key hazard mitigation measures include:
• Seismic safety standards for buildings in compliance with California seismic codes. • Floodplain management regulations to control development in flood -prone areas, ensuring compliance with the National Flood Insurance Program (NFIP). • Fire-resistant building codes and defensible space requirements for structures near wildfire - prone areas.
• Industrial hazard zoning to regulate the storage and handling of hazardous materials in compliance with California Environmental Protection Agency (CalEPA) guidelines.
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Climate and Sustainability Planning
The Cathedral City Climate Action Plan (2013) establishes a framework for reducing greenhouse gas emissions and adapting to climate-related hazards such as extreme heat and poor air quality. The plan includes mitigation strategies such as urban tree canopy expansion, energy efficiency incentives, and sustainable transportation policies.
Additionally, Cathedral City is part of the Southern California Association of Governments (SCAG) Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS) (2024), which prioritizes climate resilience in regional transportation and land use planning.
Emergency Operations and Floodplain Management
The Cathedral City Emergency Operations Plan (EOP) is currently under development and will provide a framework for disaster response and recovery. It will be updated regularly to integrate hazard-specific response protocols, interagency coordination strate gies, and public communication efforts.
The city also maintains a Floodplain Management Program, which ensures compliance with FEMA floodplain regulations and implements strategies to reduce flood risks through stormwater infrastructure upgrades and land use planning. The program is informed by the Cathedral City Stormwater Management & Urban Runoff Plan and ongoing coordination with the Riverside County Flood Control and Water Conservation District.
Capital Improvement Program (CIP)
The City’s Capital Improvement Program (CIP) prioritizes infrastructure resilience projects, including seismic retrofits for public buildings, storm drainage system enhancements, and road upgrades for emergency access. The CIP is reviewed annually to align investments with hazard mitigation priorities and supports implementation of LHMP action items related to climate resilience and critical facility upgrades.
Zoning & Land Use Policies
The City’s zoning and land use policies ensure compatible land use, disaster risk reduction, environmental sustainability, and community resilience. These regulations help mitigate earthquake risks, flooding, hazardous materials exposure, wildfire threats, and extreme heat impacts.
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The following table outlines Cathedral City’s zoning and land use policies, including applicable Municipal Code sections where available.
Policy/Code Name Code Number
(if applicable) Purpose & Relevance to Hazard Mitigation Zoning Code & Land Use
Regulations CCMC Title 9
Establishes zoning districts, land use regulations, and hazard mitigation measures, including seismic safety standards, floodplain management, and hazardous materials zoning.
Floodplain Management
Ordinance CCMC § 9.86
Regulates development in FEMA-designated flood zones, enforces NFIP requirements, and mandates elevation, stormwater drainage, and floodproofing requirements.
Seismic Safety & Building Code
Regulations CCMC § 8.04
Requires adherence to the California Building Code (CBC) seismic provisions, mandates structural retrofitting of vulnerable buildings, and regulates earthquake- resistant construction practices.
Hazardous Materials Overlay Zone CCMC § 9.62
Designates industrial zones for hazardous materials storage, requiring risk mitigation plans, spill prevention, and compliance with CalEPA and Riverside County Environmental Health Department regulations.
Fire Hazard & Wildland-Urban
Interface (WUI) Standards
CCMC § 8.12 & §
9.101
Establishes defensible space, fire-resistant building codes, and vegetation management for developments in high fire-risk areas, in compliance with Cal Fire WUI requirements.
Industrial & Manufacturing Land
Use Standards CCMC § 9.60
Regulates industrial and manufacturing development to prevent hazardous material risks, air pollution, and industrial fire hazards in compliance with South Coast Air Quality Management District (SCAQMD) regulations.
Residential Zoning & Hazard
Mitigation Requirements CCMC § 9.20
Limits residential density in high-risk areas, requires structural resilience, and incorporates climate adaptation strategies such as cool roofs and energy-efficient building design.
Redevelopment & Special Study
Areas Policies CCMC § 9.88 Guides land use changes in redevelopment areas to reduce hazard exposure, improve infrastructure resilience, and integrate sustainability measures.
Stormwater Management & Low-
Impact Development (LID)
Ordinance
CCMC § 13.10 Reduces flood risks and improves water quality through green infrastructure, permeable surfaces, bioswales, and retention basins.
Capital Improvement Program
(CIP) & Infrastructure Resilience
Standards
N/A Prioritizes investments in seismic retrofits, stormwater drainage improvements, and emergency access route enhancements to reduce disaster vulnerability.
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5.2 Floodplain Management & Compliance
The city enforces zoning, development regulations, and flood mitigation programs to ensure responsible land use in flood-prone areas and protect life and property from flood hazards . Cathedral City actively participates in the NFIP and promotes community -wide flood risk reduction through infrastructure investments, stormwater management, and hazard mitigation planning.
The following table provides a detailed overview of Cathedral City’s floodplain management policies, including applicable code numbers where available.
Policy/Code Name Code Number
(if applicable) Purpose & Relevance to Flood Mitigation Floodplain Management
Ordinance CCMC § 9.86 Regulates development in FEMA-designated flood zones, requires floodproofing, and ensures compliance with NFIP requirements.
Stormwater Management & Low-
Impact Development (LID)
Ordinance
CCMC § 13.10
Reduces flood risks through permeable surfaces, retention basins, bioswales, and stormwater detention requirements to mitigate urban runoff.
Subdivision & Land Development
Flood Standards CCMC § 9.84
Ensures new developments avoid high-risk flood areas and comply with FEMA flood elevation standards. Requires stormwater drainage infrastructure in new subdivisions.
Building Code – Flood Protection
Requirements CCMC § 15.04
Mandates flood-resistant construction, elevation requirements, and floodproofing for structures in designated flood zones. Aligns with California Building Standards Code and FEMA flood mitigation guidelines.
Capital Improvement Program
(CIP) – Drainage & Flood
Resilience Projects
N/A
Funds flood control infrastructure, storm drain system improvements, and channel maintenance to enhance flood resilience. Prioritizes projects reducing localized flooding and improving stormwater conveyance.
National Flood Insurance Program
(NFIP) Participation & Compliance N/A
Ensures compliance with FEMA floodplain regulations, making residents eligible for flood insurance under NFIP. Cathedral City actively enforces floodplain management requirements to maintain participation.
Community Rating System (CRS)
Participation N/A Cathedral City does not currently participate in the CRS.
Coachella Valley Water District
(CVWD) & Riverside County
Flood Control Coordination
N/A Collaborates with regional agencies on regional flood management, watershed planning, and stormwater infrastructure improvements.
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National Flood Insurance Program (NFIP) Participation
CID Community
Name County
Init
FHBM
Identified
Init FIRM
Identified
Curr Eff
Map Date
Reg-Emer
Date Tribal
060257#
CATHEDRAL
CITY, CITY
OF
Riverside
County 06/14/74 09/26/2008 09/26/2008 09/26/2008 No
The City of Cathedral City (CID: 060257#) joined the NFIP on September 26, 2008. According to FEMA, the city contains several mapped flood zones, including low - and moderate-risk areas as well as Special Flood Hazard Areas (SFHAs) associated with the Whitewater River Stormwater Channel and nearby drainages.
Flood Zones: The FEMA Flood Insurance Rate Maps (FIRMs) for Cathedral City were last updated on September 26, 2008. The city includes the following FEMA-designated flood zones:
• Zone X: Areas outside the 500-year floodplain, considered to have minimal flood risk. • Zone AE: High-risk flood zones with base flood elevations (BFEs) established; primarily near the Whitewater River Channel.
• Zone AH: Shallow flooding areas with ponding (1–3 feet of depth). • Zone D: Areas with possible but undetermined flood hazards.
Although a majority of Cathedral City falls within Zone X, flood hazards persist in targeted areas due to regional drainage conditions and stormwater channel proximity.
Floodplain Management Regulations and Compliance: Cathedral City enforces NFIP minimum standards through its local floodplain ordinance, zoning code, and development review procedures.
Core practices include:
• Regulating construction in mapped flood zones
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Floodplain development permits are reviewed by the Public Works Department – Engineering Division, which ensures compliance with NFIP criteria and California Building Standards Code requirements.
Adoption of NFIP Criteria: Cathedral City adopted NFIP-compliant floodplain regulations via CCMC § 8.24 (Floodplain Management Ordinance), incorporating FEMA minimum standards and flood - resistant construction guidelines.
FIRM Adoption: The City formally adopted the latest effective FIRM panels on September 26, 2008.
Implementation Oversight: The Engineering Division of the Public Works Department oversees NFIP program execution, technical guidance, and coordination with developers. Contact: (760) 770-0349.
Substantial Improvement/Substantial Damage (SI/SD) Provisions: The Planning and Development Department evaluates SI/SD thresholds post-disaster. Properties determined to meet SI/SD criteria must comply with current flood-resistant standards.
Repetitive Loss Properties (RLPs): According to FEMA’s most recent data, Cathedral City does not have any properties classified as Repetitive Loss Properties.
Community Rating System (CRS) Participation: Cathedral City does not currently participate in FEMA’s CRS program.
Regional Coordination: The City collaborates with the Coachella Valley Water District (CVWD) and Riverside County Flood Control and Water Conservation District (RCFCWCD) on:
• Regional stormwater master planning
• Channel maintenance and capital improvements
• Joint watershed-scale flood resilience initiatives
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5.3 Administrative & Technical Capabilities
Local Staff & Agencies Responsible for Mitigation
The City of Cathedral City distributes hazard mitigation responsibilities across multiple departments, with the Cathedral City Fire Department (CCFD) serving as the lead agency for emergency management. Unlike some cities that have a dedicated Emergency Ma nagement Division, Cathedral City integrates disaster response, hazard mitigation, and emergency preparedness functions primarily within CCFD, with support from Police Services, Public Works, Community and Economic Development, and regional agencies.
This section outlines the local staff and agencies responsible for mitigation and their specific roles.
Cathedral City Fire Department (CCFD)
The Cathedral City Fire Department (CCFD) is the primary agency responsible for emergency management, disaster mitigation, and response coordination. CCFD oversees fire prevention, emergency medical services, hazardous materials response, and disaster prep aredness initiatives. Key responsibilities include:
• Operation & Management of the Emergency Operations Center (EOC) – CCFD leads the City’s Emergency Operations Center (EOC), activated during disasters to coordinate response and recovery.
• Emergency Preparedness Planning – Develops and maintains the City’s Emergency Operations Plan (EOP) and integrates hazard mitigation strategies into emergency response procedures. • Community Disaster Preparedness & Training – Conducts public education campaigns, Community Emergency Response Team (CERT) training, and disaster drills to enhance community resilience.
• Fire Prevention – Implements fire safety codes, vegetation management programs, and outreach to reduce ignition risks.
• Hazardous Materials Response & Mitigation – Leads hazmat response and mitigation planning, particularly in Cathedral City’s industrial corridors.
• Mutual Aid & Regional Coordination – Works closely with Riverside County, Cal OES, FEMA, and SCAG to enhance regional emergency coordination and hazard mitigation.
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Cathedral City Police Department (CCPD)
The Cathedral City Police Department supports hazard mitigation through law enforcement, public safety operations, and emergency dispatch. CCPD also provides dispatch services for both police and fire departments, ensuring integrated emergency communication. Key responsibilities include:
• Emergency Response & Evacuations – Leads traffic management, evacuation planning, and public safety enforcement.
• Critical Infrastructure Protection – Protects key facilities and systems during emergencies. • Disaster Public Communications – Coordinates emergency notifications, media communications, and public information.
• Mutual Aid Coordination – Coordinates with regional law enforcement agencies for disaster response.
Public Works Department
The Public Works Department supports disaster recovery and resilience through infrastructure maintenance and emergency response. While Cathedral City does not directly manage floodplain and stormwater systems, it supports interagency coordination and disas ter logistics. Key responsibilities include:
• Seismic Resilience for Public Infrastructure – Oversees retrofits of public buildings, bridges, and utilities.
• Capital Improvement Program (CIP) – Manages infrastructure investments to enhance resilience, including transportation access and facility upgrades. • Emergency Response Support – Provides debris clearance, damage assessments, and infrastructure repairs post-disaster.
Community and Economic Development Department
The Community and Economic Development Department includes Planning, Building & Safety, Code Enforcement, and Economic Development. The department ensures development and code enforcement align with hazard mitigation priorities. Key responsibilities include:
• Planning Division – Zoning & Land Use Resilience – Implements hazard-sensitive land use regulations, including development restrictions in high-risk zones. • Building & Safety – Seismic Safety & Post-Disaster Assessments – Ensures structural resilience under CBC standards and conducts post-disaster building evaluations.
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• Code Enforcement – Municipal Code Compliance – Enforces property maintenance and safety codes to reduce fire, flood, and public health risks.
• Economic Development – Business Continuity Planning – Coordinates resilience strategies to safeguard the city’s commercial sectors.
Cathedral City Capital Projects & Engineering Division
Operating under Public Works, this division focuses on designing infrastructure improvements to mitigate seismic, flood, and transportation risks. Key responsibilities include:
• Drainage & Stormwater Infrastructure Coordination – Supports CVWD and RCFCD in regional drainage planning and infrastructure development.
• Seismic Resilience Projects – Oversees structural retrofits for municipal buildings. • Transportation & Evacuation Route Improvements – Enhances roadway durability and ensures clear evacuation routes during emergencies.
Interagency & Regional Coordination
Cathedral City collaborates with federal, state, and regional agencies to ensure coordinated hazard mitigation and emergency preparedness. Key partner agencies include:
• Riverside County Emergency Management Department (EMD) – Supports disaster planning and multi-jurisdictional coordination.
• Coachella Valley Water District (CVWD) – Oversees regional flood control infrastructure, regional stormwater management, potable water, and wastewater east of the Whitewater River Channel.
• Riverside County Flood Control & Water Conservation District (RCFCWCD) – Manages flood infrastructure and drainage systems west of the Whitewater River Channel. • Desert Water Agency (DWA) – Provides potable water and sewer service west of the Whitewater River Channel.
• Southern California Association of Governments (SCAG) – Supports regional climate adaptation and hazard mitigation strategies.
• California Governor’s Office of Emergency Services (Cal OES) – Provides technical assistance and grant support for emergency management.
• Federal Emergency Management Agency (FEMA) – Offers funding, policy guidance, and technical assistance under the NFIP and disaster programs.
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• Desert Recreation District (DRD) – Manages maintenance and programming for city parks under annexation agreements.
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5.4 Financial Capabilities
Local & State Funding Sources
Cathedral City has access to a variety of financial resources to support hazard mitigation, emergency preparedness, and infrastructure resilience. These include local funds, state grants, and regional financing mechanisms that help the city plan and sustain hazard mitigation strategies.
The city’s financial strategy draws from General Fund allocations, Capital Improvement Program (CIP) investments, enterprise funds, and external grants to support climate adaptation, critical infrastructure, and emergency preparedness.
The following table summarizes key local and state funding sources relevant to Cathedral City’s hazard mitigation priorities:
Funding Source Type Purpose & Relevance to Hazard Mitigation General Fund Local
Supports emergency preparedness, disaster response, and hazard mitigation planning. Funds staff salaries, training programs, and operational costs.
Capital Improvement Program (CIP) Budget Local Finances seismic retrofitting, stormwater management, flood control projects, and critical infrastructure upgrades.
Local Sales & Property Tax Revenues Local
Provides discretionary funding for emergency response
facilities, fire protection services, and public safety improvements.
Stormwater & Flood Management Fees Local (Enterprise Fund) Finances storm drainage infrastructure, retention basins, and compliance with floodplain management requirements.
Public Safety Augmentation Fund (PSAF) Local Supports fire prevention, emergency response operations, and police services for disaster-related public safety needs.
Measure A – Riverside County Local
Transportation Sales Tax
Measure A – Riverside County
Local Transportation Sales Tax
Measure A – Riverside County Local Transportation Sales Tax
California Disaster Assistance Act (CDAA)
Grants State Provides funding for post-disaster recovery, hazard mitigation projects, and emergency protective measures.
Cal OES Hazard Mitigation Grant Program
(HMGP) State Allocates funds for seismic safety, flood mitigation, wildfire resilience, and energy security projects.
California Fire Safe Council (CFSC) Grants State Supports fire prevention, vegetation management, and wildfire mitigation efforts.
California Climate Resilience & Adaptation
Grant State Provides resources for climate adaptation projects, heat mitigation programs, and sustainability initiatives.
SCAG Sustainable Communities Program
(SCP) Grants Regional (State-Administered) Funds land use planning, transportation resilience, and climate-smart infrastructure projects.
California Transportation Commission (CTC)
Active Transportation Program (ATP) State
Provides financing for transportation safety enhancements, evacuation route improvements, and pedestrian
infrastructure resilience.
Regional Supports storm drain projects, flood channel improvements, and water retention systems within Cathedral City.
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Funding Source Type Purpose & Relevance to Hazard Mitigation Riverside County Flood Control & Water
Conservation District (RCFC&WCD) Capital
Improvement Funds
Federal Programs
Cathedral City is eligible to pursue multiple federal funding sources for hazard mitigation and recovery.
These programs support investments in disaster-resilient infrastructure, housing, flood control, energy resilience, and public safety.
Funding Program Administering Agency Purpose & Relevance to Hazard Mitigation Hazard Mitigation Grant Program
(HMGP) FEMA
Provides post-disaster funding for seismic
retrofitting, flood mitigation, wildfire risk
reduction, and energy resilience projects.
Flood Mitigation Assistance
(FMA) Grant FEMA Supports stormwater management, flood-resistant infrastructure, and NFIP compliance.
Public Assistance (PA) Grant
Program FEMA
Provides reimbursement for post-disaster
emergency response costs, infrastructure repairs,
and debris removal.
Community Development Block
Grant – Disaster Recovery
(CDBG-DR)
HUD
Provides post-disaster funding for housing
reconstruction, infrastructure repairs, and
community resilience initiatives.
Transportation Infrastructure
Resilience Grants (RAISE &
INFRA Grants)
U.S. Department of
Transportation (DOT)
Funds evacuation route enhancements, seismic
retrofits for bridges, and climate-adaptive
transportation projects.
U.S. Army Corps of Engineers
(USACE) Flood Risk Management
Program
USACE
Supports levee improvements, stormwater
diversion systems, and large-scale flood mitigation
projects.
EPA Climate Pollution Reduction
Grants (CPRG)
U.S. Environmental
Protection Agency
(EPA)
Supports climate resilience projects, heat island
reduction strategies, and energy-efficient
infrastructure upgrades.
5.5 Community Partnerships & Collaboration
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Public-Private Partnerships
Cathedral City has the potential to build a strong network of public -private partnerships (PPPs) that support hazard mitigation, emergency response, and community resilience. The city collaborates with businesses, industrial stakeholders, nonprofit organizations, utility providers, and regional agencies to enhance disaster preparedness, infrastructure resilience, and economic stability in the face of natural and human-caused hazards.
As a city with growing commercial and industrial sectors, Cathedral City prioritizes private -sector engagement in hazard mitigation planning. Key focus areas for PPPs include:
• Infrastructure protection
• Emergency management coordination
• Transportation resilience
• Climate adaptation initiatives
• Business continuity planning
The following table summarizes Cathedral City’s key public -private partnerships, followed by a detailed narrative describing their roles and contributions to hazard mitigation.
Public-Private Partner Sector Role in Hazard Mitigation & Resilience Coachella Valley Chamber of
Commerce ( Business/Industry Facilitates business continuity planning, emergency preparedness training, and economic recovery coordination.
Southern California Edison (SCE) Energy & Utilities Provides grid resilience upgrades, wildfire mitigation efforts, and emergency power restoration planning.
Coachella Valley Water District
(CVWD) Water & Utilities Oversees regional stormwater management, regional flood mitigation projects, and NFIP compliance.
Desart Water Agency Water & Utilities Water supply and sewer collection.
Coachella Valley Economic
Partnership CVEP
Economic
Development
Supports disaster recovery funding, business resilience strategies, and workforce development post-disaster.
Southern California Association of
Governments (SCAG) Regional Planning Provides technical assistance for climate adaptation, sustainable transportation, and hazard mitigation grants.
Union Pacific Railroad &
Transportation Partners Transportation Coordinates hazardous materials transport safety, rail infrastructure resilience, and evacuation logistics.
Local Industrial Businesses
(Manufacturing, Logistics, & Retail
Sectors)
Industry & Trade Implements hazardous materials storage safety, emergency response training, and facility retrofitting projects.
American Red Cross &
Community-Based Organizations
(CBOs)
Nonprofit/Public
Health
Provides disaster relief, emergency shelter support, and public education on hazard mitigation.
Homeowner Associations (HOAs)
& Property Owners Residential Enhances flood mitigation, wildfire preparedness, and seismic resilience in private developments.
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Regional and Multi-Jurisdictional Coordination
Cathedral City is integrated into regional and multi -jurisdictional hazard mitigation efforts, working with Riverside County agencies, regional planning organizations, mutual aid networks, and state and federal entities. Given the city’s geographic location within the Coachella Valley, exposure to multiple hazards (earthquakes, floods, extreme heat, and hazardous materials incidents), and transportation infrastructure, intergovernmental coordination is crucial for:
• Enhancing disaster preparedness
• Protecting critical infrastructure
• Ensuring emergency response efficiency
• Improving regional climate resilience
The table below provides an overview of Cathedral City’s regional and multi-jurisdictional partners, followed by detailed descriptions of their roles in hazard mitigation.
Agency/Organization Jurisdiction /
Scope Role in Hazard Mitigation & Resilience
Riverside County Emergency Management
Department (EMD) Countywide Coordinates disaster response, mutual aid, and regional emergency planning.
Riverside County Fire Department (RCFD) / CAL
FIRE Countywide Provides fire suppression, hazardous materials response, and emergency medical services.
Coachella Valley Water District (CVWD) Regional Oversees stormwater management, flood mitigation projects, and NFIP compliance.
Desert Water Agency Regional Water supply and sewer collection.
Southern California Association of Governments
(SCAG) Regional Supports climate adaptation, sustainable land use planning, and transportation resilience.
California Governor’s Office of Emergency
Services (Cal OES) Statewide Administers hazard mitigation grants, disaster response coordination, and emergency planning support.
Federal Emergency Management Agency (FEMA)
– Region IX Federal Provides funding, technical assistance, and disaster response resources.
National Weather Service (NWS) – San Diego Regional Issues extreme weather warnings and climate risk forecasts for Cathedral City.
U.S. Army Corps of Engineers (USACE) Federal Leads flood control infrastructure projects and large-scale mitigation efforts.
Metropolitan Water District of Southern
California (MWD) Regional Coordinates drought resilience planning and emergency water supply management.
California Department of Transportation
(Caltrans) – District 8 Statewide Supports transportation infrastructure resilience and evacuation route planning.
Riverside County Sheriff’s Department (RCSD) –
Emergency Operations Bureau Countywide Provides law enforcement mutual aid, security coordination, and emergency evacuation support.
California Department of Water Resources
(DWR) Statewide Supports floodplain management, groundwater sustainability, and drought mitigation.
South Coast Air Quality Management District
(SCAQMD) Regional Monitors air quality and supports extreme heat and wildfire smoke mitigation efforts.
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5.6 Strengths, Weaknesses, Opportunities, and Threats
(SWOT) Analysis
The SWOT analysis provides a detailed assessment of Cathedral City’s capabilities, challenges, potential improvements, and external risks in the context of hazard mitigation and resilience planning. This section evaluates internal strengths and weaknesses (factors within the City’s control) and external opportunities and threats (factors influenced by regional, state, and federal conditions).
The table below provides a summary of the SWOT analysis, followed by detailed explanations of each category.
Category Key Findings
Strengths Strong emergency response capabilities, existing hazard mitigation plans, established public -private partnerships, participation in regional climate adaptation efforts.
Weaknesses Aging infrastructure, limited dedicated funding for large -scale mitigation projects, reliance on regional agencies for emergency response coordination, high exposure to extreme heat risks.
Opportunities Access to state and federal funding, emerging climate adaptation initiatives, regional transportation resilience projects, potential for wildfire and flood mitigation partnerships.
Threats Increasing climate risks (extreme heat, flooding), seismic vulnerability, hazardous materials incidents, energy grid reliability issues, reliance on imported water supplies.
Strengths
Cathedral City has several internal capabilities that enhance its ability to mitigate, respond to, and recover from hazards. The Cathedral City Fire Department (CCFD) serves as the primary emergency management agency, leading disaster response, hazardous m aterials incidents, and emergency preparedness efforts. The city benefits from a well -equipped Emergency Operations Center (EOC), which facilitates coordination among city departments and regional agencies during disasters.
Additionally, the Cathedral City Police Department (CCPD) plays a critical role in emergency evacuations, law enforcement support, and public safety coordination. CCPD also provides dispatch services for both police and fire.
Cathedral City has made significant progress in hazard mitigation planning through its Local Hazard Mitigation Plan (LHMP) and General Plan Safety Element, which integrate disaster risk reduction policies into land use, emergency response, and climate adap tation efforts. The city also actively coordinates with regional partners such as the Riverside County Emergency Management Department (EMD), the Coachella Valley Association of Governments (CVAG), and the Southern California Association of Governments (SCAG) to enhance multi-jurisdictional planning and resilience-building strategies.
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Another key strength is the city’s public -private partnerships and regional collaboration with utility and water agencies. These include the Coachella Valley Water District (CVWD) for regional stormwater management, regional flood control, and water conservation; Desert Water Agency (DWA) for potable water and sewer collection west of the Whitewater River; and Southern California Edison (SCE) for wildfire mitigation and electrical grid reliability. Cathedral City’s diverse and growing commercial and industrial sectors further contribute to economic stability and provide opportunities for business continuity planning, hazardous materials risk reduction, and private-sector investment in resilience initiatives.
Weaknesses
Despite its strengths, Cathedral City faces several internal challenges that impact its ability to implement large -scale hazard mitigation projects. One of the most pressing concerns is its aging infrastructure, including older public buildings, roadways, and utility systems that require seismic retrofitting, flood-resistant upgrades, and cooling infrastructure improvements to combat extreme heat.
The city’s stormwater drainage system is aging and managed largely the Riverside County Flood Control and Water Conservation District (RCFC&WCD), contributing to localized flooding during high-intensity rainfall events. Older neighborhoods, including mobile home parks, remain vulnerable to heat-related emergencies, high wind events, and flooding.
Cathedral City also has limited dedicated funding for large-scale mitigation projects. While the General Fund and Capital Improvement Program (CIP) support ongoing infrastructure maintenance, funding for seismic retrofits, advanced stormwater systems, and cooling center expansions relies heavily on state and federal grants. Several key projects remain dependent on the availability of external financial assistance.
The city’s reliance on regional agencies for emergency response coordination is another constraint.
While CCFD leads fire and hazmat response within city limits, major wildfire incidents, large -scale evacuations, and post -disaster recovery operations requi re support from Riverside County Fire Department (RCFD), CAL FIRE, and mutual aid partners. This interdependence, while critical, may introduce coordination delays during simultaneous regional emergencies.
Extreme heat also presents growing challenges. With more frequent and prolonged heatwaves, Cathedral City’s low-income residents, elderly populations, and outdoor workers are at increased risk, especially where there is limited access to air conditioning o r cooling centers. The city’s sparse urban tree canopy coverage exacerbates localized heat island effects, heightening public health risks and increasing energy demands during peak summer months.
Opportunities
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Cathedral City has access to several external opportunities that can improve its resilience to hazards.
The city is eligible for multiple state and federal hazard mitigation programs, including
FEMA’s Hazard Mitigation Grant Program (HMGP) and the California Climate Adaptation Planning Grant Program (CAPG), now administered by the Governor’s Office of Planning and Research (OPR).
Expanding the city’s participation in FEMA’s Community Rating System (CRS) program would help reduce flood insura nce premiums for property owners while improving the city’s floodplain management practices.
Emerging climate adaptation programs offer further opportunities. The Coachella Valley Multiple Species Habitat Conservation Plan (CVMSHCP) supports wildfire prevention and regional conservation strategies. SCAG’s Sustainable Communities Program (SCP) and Active Transportation Program (ATP) provide planning and infrastructure funding for transportation safety, climate adaptation, and multimodal resilience. Cathedral City may also benefit from state initiatives under the Extreme Heat Action Plan and Inflatio n Reduction Act (IRA) -funded energy resilience and urban greening programs.
Expanded public-private partnerships present another key opportunity. Cathedral City can collaborate with SCE, CVWD, DWA, and local industries to implement solar-powered cooling stations, distributed energy storage, and smart -grid infrastructure. Additiona lly, pilot projects involving AI -driven flood forecasting, real-time air quality monitoring, and battery -powered microgrids can enhance the city’s adaptive capacity. Participation in Southern California Edison’s Public Safety Power Shutoff (PSPS) mitigation efforts also offers opportunities to reduce power -related vulnerability during wildfire conditions.
Threats
Cathedral City faces several external threats that could exacerbate hazard vulnerabilities. Climate change is intensifying the frequency and severity of extreme heat events, increasing risks of heat illness, power outages, and wildfire ignition. Prolonged drought, coupled with dependence on imported water from the Colorado River and State Water Project, presents ongoing threats to water security and fire suppression capacity. Water conservation mandates and regional allocation reductions could strain future municipal and residential supply.
Seismic threats remain severe due to the city’s proximity to the San Andreas Fault and associated systems. A major earthquake could damage critical infrastructure, disrupt utilities, and compromise Local Hazard Mitigation Plan Update
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public safety. Older unreinforced masonry buildings and aging mobile homes are especially susceptible to collapse and loss during a major seismic event.
The city's industrial sector and major transportation corridors-particularly Interstate 10 and the Union Pacific rail line-pose ongoing hazardous materials risks. Accidents involving freight trucks or rail cars carrying flammable or toxic substances could lead to explosions, environmental contamination, or mass evacuation events. Compliance with CalEPA and regional air quality regulations helps mitigate these risks, but the potential for accidents remains.
Lastly, energy grid reliability is an increasing concern. Wildfire -related Public Safety Power Shutoffs (PSPS), cyberattacks, and grid strain during peak demand periods all threaten service continuity.
Extended outages may severely affect residents who rel y on electricity for medical devices, communications, and cooling. As electrification expands and extreme heat intensifies, the resilience of the power supply will become even more critical to Cathedral City’s emergency management strategy.
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5.7 Opportunities for Improvement
Cathedral City has made substantial progress in hazard mitigation through regulatory planning, emergency management coordination, and infrastructure investments. However, there are opportunities for improvement that can strengthen resilience, expand financial resources, and enhance public safety. By refining regulatory frameworks, administrative capabilities, funding strategies, and community engagement efforts, Cathedral City can ensure it remains adaptive to emerging hazards and climate-related risks.
Regulatory and Planning Mechanisms
Cathedral City has integrated hazard mitigation policies into its General Plan’s Safety Element, yet there are opportunities to further strengthen zoning regulations and building code enforcement.
Enhancing seismic retrofitting mandates for vulnerable structures, elevating minimum flood protection standards, and embedding wildfire-resistant design principles into new developments would mitigate long-term disaster risks. Additionally, pursuing enrollment in FEMA’s Community Rating System (CRS) program could improve floodplain management practices, enhance stormwater control efforts, and lower flood insurance premiums for residents and businesses.
Cathedral City also has the opportunity to align hazard mitigation planning with regional climate adaptation frameworks. Expanding urban heat mitigation strategies -such as increasing tree canopy coverage, integrating green infrastructure, and adopting ener gy-efficient building standards -can reduce extreme heat risks and support climate resilience. Coordination with the Coachella Valley Association of Governments (CVAG) and implementation of CVAG’s Blowsand and Flooding Mitigation Study recommendations would further enhance citywide resilience. Strengthening stormwater management policies through additional low -impact development (LID) measures and enhanced drainage system planning would also reduce flood vulnerabilities.
Administrative and Technical Capabilities
Expanding administrative and technical capabilities can improve Cathedral City’s capacity for disaster preparedness, hazard mitigation, and emergency response. While the city relies on multiple departments and regional partnerships to execute hazard mitiga tion initiatives, consideration should be given to establishing a full -time emergency management coordinator position to provide more focused oversight and accelerate the implementation of resilience strategies. Formally designating an Office of Emergency Management within the Fire Department or City Manager’s Office could Local Hazard Mitigation Plan Update
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streamline disaster planning, enhance interagency coordination, and improve hazard mitigation program oversight.
Additionally, developing a centralized data -sharing platform for real -time risk assessment and emergency response coordination could improve communication between municipal agencies, regional stakeholders, and first responders. Strengthening partnerships with Riverside County, Cal OES, FEMA, and SCAG could enhance technical support, access to specialized training, and grant opportunities.
Expanding multi-jurisdictional collaboration would allow Cathedral City to leverage regional expertise in disaster recovery, climate adaptation, and infrastructure resilience planning.
Financial Resources
While Cathedral City has successfully secured federal and state grants for mitigation projects, diversifying funding sources remains a priority. Expanding participation in FEMA grant programs and newer funding sources such as the Climate Resilience Planning & Adaptation Grants (CRPAG) administered by the Governor’s Office of Planning and Research (OPR) could provide additional funding for seismic safety upgrades, flood control projects, and extreme heat mitigation initiatives. The city could also explore bond financing, local hazard mitigation fees, and public-private partnerships to fund large-scale resilience investments.
The community should consider integrating insurability planning into ongoing resilience and economic development planning. Insurability planning focuses on the relationships between:
• Resilience/mitigation investments and insurance affordability and accessibility. • Scope and nature of insurance protection gaps and the community’s ability to respond/recover from catastrophes.
• Cost and availability of insurance and its effect on property valuations and the tax base.
Given the growing impact of extreme weather on insurance markets, Cathedral City should assess provider stability, insurance coverage options, and innovative risk financing solutions. Exploring alternative financial tools, such as Geologic Hazard Abatement Districts (GHADs) and regional taxing authorities, could create sustainable, long -term funding mechanisms for hazard mitigation projects.
Additionally, parametric insurance models and resilience bonds -which provide pre -determined payouts based on hazard intensity rather than damage assessments-could help the city secure financial resources for rapid disaster recovery.
Community Outreach and Education
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Enhancing community engagement and public education efforts can improve disaster preparedness and response readiness. Developing multilingual hazard preparedness materials, implementing targeted outreach programs, and working with schools, faith -based organizations, and local businesses could increase participation in emergency preparedness initiatives.
Improving public awareness of climate adaptation strategies-including extreme heat mitigation, water conservation, and energy resilience -can also help residents and businesses prepare for long -term environmental changes. Establishing formal partnerships wi th Cathedral City Library, Desert Recreation District facilities, and senior centers as resilience hubs could provide residents with access to cooling centers, emergency resources, and preparedness training.
Resilience and Adaptation
Cathedral City can benefit from a more integrated approach to climate adaptation within its hazard mitigation planning. With the increasing frequency of extreme heat events, wildfires, and flooding, aligning resilience planning with regional climate adaptation frameworks-such as those established by SCAG, the California Air Resources Board (CARB), and the Coachella Valley Association of Governments (CVAG) -will be critical. Expanding green infrastructure initiatives, integrating renewable energy solutions in to municipal buildings, and enhancing heat resilience through community shade programs, reflective surface retrofits, and urban forestry partnerships with CAL FIRE’s Urban and Community Forestry Program will help mitigate both climate and disaster risks.
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SECTION 6 – MITIGATION STRATEGY
Element C: Mitigation Strategy Requirements
C1. Does the plan document each jurisdiction’s existing authorities, policies, programs and resources and its ability to expand on and improve these existing policies and programs? (Requirement 44 CFR § 201.6(c)(3)) C2. Does the plan address each jurisdiction’s participation in the NFIP and continued compliance with NFIP requirements, as appropriate? (Requirement 44 CFR § 201.6(c)(3)(ii))
C3. Does the plan include goals to reduce/avoid long-term vulnerabilities to the identified hazards? (Requirement 44 CFR § 201.6(c)(3)(i)) C4. Does the plan identify and analyze a comprehensive range of specific mitigation actions and projects for each jurisdiction being considered to reduce the effects of hazards, with emphasis on new and existing buildings and infrastructure? (Requirement 44 CFR § 201.6(c)(3)(ii))
C5. Does the plan contain an action plan that describes how the actions identified will be prioritized (including cost benefit review), implemented and administered by each jurisdiction? (Requirement 44 CFR § 201.6(c)(3)(iii)); (Requirement 44 CFR § 201.6(c)(3)(iv))
6.1 Introduction
The Mitigation Strategy serves as a comprehensive guide for the City of Cathedral City in its pursuit of enhancing disaster resilience by reducing vulnerability to identified hazards. Through the identification of specific mitigation goals and objectives, strategies and initiatives are formulated to prevent, minimize, and alleviate the impacts of both natural and human -caused disasters on the local population and property within the planning area.
Strengthening community resilience involves the implementation of building codes, zoning ordinances, and other regulatory measures. During the review or update of these planning mechanisms, there is an opportunity to assess the feasibility of integrating mitigation strategies into policy changes.
City departments -including Fire, Public Works, Planning, Engineering, and Community Development-make recommendations to the City Manager and Cathedral City’s City Council regarding prioritization, phasing, and fund ing of hazard mitigation actions and capital investments. Capital Local Hazard Mitigation Plan Update
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Improvement Projects and other mitigation initiatives may receive public hearings as either part of the budgeting process or as individual staff items for City Council, which allows for public input.
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6.2 Vision, Goals, & Objectives
Alignment with FEMA and Local Resilience Priorities
The mitigation vision, goals, and objectives for the City of Cathedral City form the foundation of this Local Hazard Mitigation Plan (LHMP) and directly support the requirements of the Disaster Mitigation Act of 2000 (DMA 2000). These components articulate the community’s long -term aspirations to reduce hazard vulnerability and enhance resilience, while aligning with FEMA’s national mitigation mission and the State of California’s 2023 State Hazard Mitigation Plan (SHMP).
Mitigation Vision
The planning team established the following vision statement, goals, and objectives after reviewing existing City and regional plans, conducting risk assessments, and incorporating public and stakeholder input.
"To protect the lives, health, safety, and economic stability of Cathedral City residents, workers, and institutions by reducing the long-term risk of hazards through sustainable, equitable, and coordinated strategies that increase community resilience." This vision supports the principles outlined in the FEMA Mitigation Planning Policy Guide (2025), including risk-informed decision-making, whole community involvement, and integration with other local and regional plans. It also supports key priorities in the 2040 Cathedral City General Plan, particularly those expressed in the Safety Element, Environmental Justice Element, and Conservation and Open Space Element
Mitigation Goals and Objectives
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Goal Objective(s)
1. Protect public health and safety by
reducing life-threatening risks from natural
and human-caused hazards.
1.1 Identify and prioritize the most vulnerable populations, facilities, and systems through risk and capability assessments. 1.2 Promote retrofitting and emergency preparedness at essential facilities, including fire stations, schools, and critical infrastructure.
2. Minimize damage to property,
infrastructure, and economic assets.
2.1 Integrate hazard mitigation into the City’s Capital Improvement Plan and development review process. 2.2 Support pre-disaster retrofitting, relocation, and elevation of at-risk structures. 2.3 Encourage adaptive reuse and zoning strategies in flood- or earthquake-prone areas.
3. Enhance hazard awareness, emergency
preparedness, and public education.
3.1 Conduct multilingual public education campaigns tailored to each hazard. 3.2 Engage residents in evacuation planning, shelter location awareness, and climate-related health risk communications.
Goal Objective(s)
4. Support equitable access to hazard mitigation
benefits and reduce disproportionate impacts on
vulnerable and underserved populations.
4.1 Prioritize mitigation actions in disadvantaged communities (DACs) as identified in the Environmental Justice Element and CalEnviroScreen. 4.2 Ensure that climate adaptation and air quality initiatives also address health burdens in overburdened neighborhoods.
5. Promote environmental sustainability and
natural systems resilience.
5.1 Expand green infrastructure projects that reduce urban heat, manage stormwater, and improve air quality. 5.2 Coordinate mitigation projects with goals in the Conservation and Open Space Element and regional habitat restoration efforts.
6. Strengthen interagency coordination, capacity
building, and funding readiness.
6.1 Maintain an interdepartmental Hazard Mitigation Working Group to guide implementation. 6.2 Pursue federal and state hazard mitigation grants (e.g., HMGP, FMA) with shovel-ready project proposals. 6.3 Coordinate mitigation investments with SCAG, Riverside County agencies, Cal OES, and FEMA.
Integration with FEMA and State Resilience Priorities
This mitigation framework reflects a dual commitment to both federal and state resilience priorities by aligning closely with FEMA’s 2025 Local Mitigation Planning Policy Guide and California’s 2023 State Hazard Mitigation Plan (SHMP). Cathedral City’s goa ls and objectives are designed to address hazard mitigation through a comprehensive, equity -driven, and climate -resilient lens consistent with both agencies’ strategic direction.
At the federal level, this plan supports FEMA’s emphasis on risk -informed decision -making, community-based planning, and proactive pre -disaster hazard mitigation. Equally important is the City’s alignment with the State of California’s resilience agenda. The mitigation strategy integrates core priorities identified in the 2023 SHMP, including the advancement of climate adaptation, Local Hazard Mitigation Plan Update
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environmental justice, and housing resilience under the Regional Housing Needs Assessment (RHNA).
This includes coordination with the state’s climate -smart land use strategies, alignment with the Safeguarding California Plan, and implementation of cross -sector risk reduction approaches recommended by Cal OES, the California Air Resources Board (CARB), and the California Natural Resources Agency.
Cathedral City’s plan also supports state directives related to wildfire preparedness, flood risk reduction, extreme heat mitigation, and the advancement of green infrastructure projects. Through integration with SCAG’s Sustainable Communities Strategy and regional adaptation frameworks, the City enhances its ability to access and apply state funding programs, such as the California Climate Resilience Fund and the Integrated Climate Adaptation and Resiliency Program .
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6.3 Mitigation Actions
The action items are a listing of activities in which City agencies and citizens can be engaged to reduce risk . Each action item includes an estimate of the timeline for implementation.
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
All Hazards
Backup Power
for Critical
Facilities
Install backup generators or solar + battery systems at fire stations, police, EOCs, and designated shelters to ensure service continuity.
First responders,
vulnerable
populations
Continuity of
Operations,
Public Safety
Public Works,
Fire Department
FEMA HMGP,
CPUC
Resilience
Fund,
1–2 years High Yes
All Hazards
Multilingual
Public Alert &
Warning System
Expand and modernize public alert systems (SMS,
radio, signage) with multilingual content and
redundant communication paths.
LEP populations,
renters, elderly
Risk
Communication,
Public Safety
IT/Communicatio
ns Division under
the City
Manager’s Office,
Police Services
FEMA IPAWS,
Cal OES Public
Alert &
Warning Grant
1–2 years High No
All Hazards
Community
Outreach and
Preparedness
Campaign
Implement annual public education and outreach
campaigns (virtual and in-person) tailored to diverse
hazards and languages.
Renters, youth,
elderly, LEP
households
Public
Awareness,
Equity
Fire Department,
Community
Services and
Cathedral City
Fire Department
(CERT Program)
FEMA HMGP
(Capability &
Capacity
Building), Cal
OES Outreach
Support
Ongoing Medium No
All Hazards
Local Hazard
Mitigation
Working Group
Formalize a multi-department team to track
mitigation progress, seek grants, update hazard data,
and ensure ongoing LHMP implementation.
Departmental silos,
funding
fragmentation
Plan
Maintenance,
Interagency
Coordination
Cathedral City
Fire Department
(lead), Public
Works, Planning,
Police, and
Engineering
No-cost, with
eligibility for
FEMA HMGP
C&CB
technical
assistance
Within 1
year Low No
Power Outage,
Earthquake,
Extreme Heat
Harden Utility
Infrastructure in
High-Risk
Corridors
Underground or retrofit critical utility lines and
transformers to maintain service during heat, seismic,
and fire-triggered power disruptions.
Lifeline
infrastructure,
emergency services
Continuity of
Operations,
Infrastructure
Protection
Public Works,
Utility Partners
(Southern
California Edison
(SCE))
FEMA HMGP,
CPUC
Resilience
Fund, Cal OES
Utility
1–3 years High No
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Mitigation
Grant
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Flooding, Fire,
High Wind
Multi-Use
Green
Infrastructure
for Flood and
Fire Buffers
Construct bioswales, fire-resistant landscaping, and
greenbelts that both manage runoff and act as fire
breaks in vulnerable areas.
Drainage corridors,
WUI zones, Varner
Road/I-10 corridor,
washes east of Date
Palm Drive
Environmental
Protection,
Community
Safety
Public Works,
Community
Development
DWR IRWM,
CVAG
Blowsand
Mitigation
Program, State
Water Board
SRF
2–4 years High Yes
Earthquake,
High Wind, Fire
Resilient Home
Retrofit
Incentive
Program
Provide financial incentives for residents to upgrade
roofs, brace water heaters, and install defensible space and fire-resistant materials.
Mobile home parks in
northern Cathedral
City and older block-
frame homes in the
Cove District.
Housing
Resilience, Life
Safety
Community
Development
HMGP,
CalFire Fire
Prevention
Grants, Seismic
Safety Retrofit
Fund
2–3 years Medium Yes
Flooding, Fire,
Landslide
Debris Flow and
Runoff
Mitigation at
Washes and
Slopes
Upgrade culverts, retention basins, and slope
reinforcements in areas with flood, fire, and erosion
risks.
Panorama
neighborhood slopes,
foothills along
Cathedral Canyon
Drive, and Cathedral
Canyon Wash
drainage paths.
Risk Reduction,
Infrastructure
Protection
Public Works,
Engineering
Division
FEMA FMA,
DWR Urban
Streams
Program, Cal
OES Slope
Hazard
Mitigation
Fund
2–5 years Medium No
Power Outage,
Cyberattack,
Earthquake
Redundant
Emergency
Communication
s Systems
Deploy solar-powered and backup-capable radios and
alert systems to ensure public safety alerts during grid or cyber disruptions.
Public alert systems,
Cathedral City EOC
(Civic Center), and
communications
towers on Perez
Road.
Operational
Continuity,
Emergency
Coordination
IT Department,
Cathedral City
Police
Department
(CCPD)
FEMA HMGP,
Cal OES
Emergency
Communicatio
ns Grants,
UASI
1–2 years Medium No
Fire, Wind,
Earthquake
Wind- and Fire-
Resistant Street
Tree
Replacement
Replace hazardous street trees along evacuation routes
with fire- and wind-resistant species.
East Palm Canyon
Drive, Cathedral
Canyon Drive—
subject to falling
limbs and wind-
driven embers.
Public Safety,
Environmental
Resilience
Public Works,
Parks Division
Cal Fire Urban
Forestry,
CPUC
Vegetation
Management
Fund
2–3 years Low Yes
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Fire, Flooding,
Drought
Urban Wash
Management
and Vegetation
Control
Establish shaded fuel breaks and invasive plant
removal in wash areas that are vulnerable to wildfire
ignition and post-drought flood erosion.
Whitewater Wash,
Desert Cove areas,
and open parcels near
East Palm Canyon are
prone to fire and
erosion.
Fire Risk
Reduction, Flood
Control
Public Works,
Fire Department
Cal Fire Fire
Prevention,
NRCS EQIP,
State Parks
Green
Infrastructure
3–5 years Low No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Fire, Flooding,
Drought
Urban Wash
Management
and Vegetation
Control
Establish shaded fuel breaks and invasive plant
removal in wash areas that are vulnerable to wildfire
ignition and post-drought flood erosion.
Whitewater Wash,
Desert Cove areas,
and open parcels near
East Palm Canyon are
prone to fire and
erosion.
Fire Risk
Reduction, Flood
Control
Public Works,
Fire Department
Cal Fire Fire
Prevention,
NRCS EQIP,
State Parks
Green
Infrastructure
3–5 years 3 No
Earthquake,
Pandemic,
Power Outage
Emergency
Shelter
Resilience
Upgrades
Retrofit Cathedral City Senior Center, Agua Caliente
Elementary multipurpose room, and designated
shelter sites for seismic, power, and air filtration
resilience.
Seniors, disabled
persons, medically
vulnerable
Shelter
Readiness,
Equity, Health
Protection
Community
Services, Public
Works
FEMA HMGP,
HUD CDBG-
DR, Cal OES
Preparedness
Grant
2–3 years 2 Yes
Extreme Heat,
Drought, Fire
Community
Cooling and
Resilience Hub
Network
Retrofit Cathedral City Library, Senior Center, and
partner school sites, among others, to serve as
resilience hubs with cooling, hydration, and
emergency communications.
Elderly, medically
fragile, and
linguistically isolated
populations
concentrated in
Dream Homes and
Rio Vista
neighborhoods.
Health
Protection, Risk
Communication
Fire Department,
Community
Development
, CPUC
Resilience
Fund, Cal OES
Preparedness
Funds
1–2 years 2 No
Extreme Heat
Resilience Hubs
with Cooling
Infrastructure
Retrofit public buildings as community hubs with air
conditioning, hydration, and backup power.
Outdoor workers and
mobile home
residents also face
high exposure risks
during prolonged
heat events.
Protect Life and
Health,
Community
Resilience
Fire Dept,
Community
Services
, Cal OES
Preparedness
Grants, CPUC
Resilience
Fund
1–2 years 1 No
Extreme Heat
Shade Tree and
Cool Roof
Programs
Implement incentive program for planting shade trees
and installing reflective roofs on residential
properties.
Urban heat islands
and mobile home
parks; older single-
story homes with
dark roofs.
Reduce Heat
Island Effect
Community
Development
Cal Fire Urban
Forestry,
AQMD AB
617, CA
Strategic
Growth Fund
2–3 years 2 No
Local Hazard Mitigation Plan Update
254
Extreme Heat
Cooling Center
Expansion &
Transit Access
Expand hours, seating, and ADA access at cooling
centers; enhance transit linkages from vulnerable
neighborhoods.
Seniors, transit-
dependent residents,
and outdoor workers
in underserved areas.
Increase Access
to Cooling
Resources
Community
Services, Transit
Dept
Cal OES,
Caltrans
Active
Transportation
Grant
1–2 years 2 No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Extreme Heat
Passive Cooling
Design for New
Development
Require passive cooling features (orientation,
ventilation, shading) in zoning/building code for new
builds.
New housing and
commercial
development in high-
exposure areas.
Integrate Heat
Resilience in
Development
Community
Development
Local
Ordinances,
CalGreen, CEC
Title 24
Ongoing 3 No
Extreme Heat
Heat Emergency
Alert &
Outreach
System
Implement neighborhood-level text/call/email alerts
and distribute heat preparedness kits in multiple
languages.
LEP communities,
renters without A/C,
and senior
populations
Risk
Communication,
Preparedness
Fire Dept, IT
Cal OES Public
Safety Power
Shutoff
Outreach,
FEMA HMGP
1 year 3 No
Drought
Landscape
Conversion
Incentive
Program
Offer rebates for turf replacement with drought-
tolerant native landscaping in residential and
commercial zones.
High water use
residential areas with
turf lawns, HOA
communities, and
commercial corridors
with ornamental
landscaping.
Water
Conservation,
Resilience
Community
Development,
Water District
DWR Water
Use Efficiency,
Metropolitan
Water District
Grants
1–2 years 1 No
Drought
Recycled Water
Infrastructure
Expansion
Extend recycled water lines to city parks, CVUSD
school fields, and industrial parks.
Parks, schools,
industrial users
Water Reliability,
Sustainability
Public Works,
Water Utility
State Water
Board SRF,
DWR IRWM
3–5 years 2 No
Drought
Smart Metering
and Leak
Detection
Implement AMI meters and leak detection systems for
schools, apartment complexes, and city-owned
facilities
High water-
consuming
properties, including
hotels, schools, and
multi-family
buildings.
Resource
Protection,
Operational
Efficiency
Public Works,
Water District
DWR Leak
Detection and
Repair Grants
2 years 2 No
Local Hazard Mitigation Plan Update
255
Drought
Drought
Emergency
Ordinance
Codify mandatory water reduction measures during
declared drought emergencies.
All residential,
commercial, and
institutional water
users; most acute for
HOAs, golf courses,
and landscaped
corridors.
Policy Readiness,
Public
Compliance
Community
Development,
Legal
Local
Resources 1 year 3 No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Drought
Groundwater
Recharge
Feasibility Study
Assess sites for groundwater recharge using
stormwater or recycled water to offset drought
depletion.
Long-term aquifer
health and future
potable water
reliability; Cathedral
City relies on
Colorado River and
local groundwater
sources.
Sustainable
Water Supply
Public Works,
Water Agency
DWR
Sustainable
Groundwater
Management
1–2 years Low No
Fire
Defensible
Space
Enforcement
Program
Conduct targeted inspections and enforcement for
brush clearance in Very High Fire Hazard Zones.
Homes along the
lower cove, Cathedral
Canyon foothills, and
undeveloped areas
with adjacent
vegetation.
Fire Risk
Reduction, Code
Compliance
Fire Dept, Code
Enforcement
Cal Fire Fire
Prevention
Grants, FEMA
HMGP
Annual High Yes
Fire
Ember-Resistant
Retrofit
Incentives
Provide rebates for ember-resistant vents, window
screens, and non-combustible siding.
Pre-2008 homes
lacking ember-
resistant construction
near wildfire-prone
washes or open space
buffers.
Home Hardening,
Life Safety
Community
Development
Cal Fire
Building
Resilience
Grant
2–3 years Medium Yes
Fire
Public Smoke
Protection &
Air Filtration
Install HEPA filtration in public buildings (e.g.,
Senior Center, Library) and distribute air purifiers
during poor AQI events.
Asthma-prone
residents, seniors, and
low-income renters
in areas impacted by
smoke drift (e.g.,
north of Ramon
Road).
Health
Resilience,
Indoor Air
Quality
Public Health,
Community
Services
Cal OES,
AQMD AB
617, FEMA
HMGP
1–2 years Medium No
Local Hazard Mitigation Plan Update
256
Fire
Fuel
Management in
Washes and
Open Space
Conduct mechanical thinning and prescribed grazing
in city-owned open spaces and canyons.
City-owned open
space and
undeveloped washes
(e.g., Whitewater
Channel, East
Cathedral Canyon),
with dense brush and
unmanaged fuels.
Fire Spread
Prevention,
Ecosystem Health
Public Works,
Fire Department
Cal Fire
Wildfire
Prevention,
NRCS EQIP
2–4 years Low No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Fire
Community
Evacuation
Planning &
Drills
Develop block-level evacuation maps and conduct
multilingual community drills with alert systems.
LEP populations in
mobile home parks
and multifamily
complexes;
neighborhoods with
limited egress near
foothills
Public Safety,
Emergency
Preparedness
Fire Dept, Police
Services
FEMA HMGP,
Cal OES
Planning
Grants
1 year Low No
Power Outage
Backup
Generators for
Critical
Facilities
Install permanent backup generators at police
stations, fire stations, EOCs, and senior centers.
Fire stations, police
substation, EOC, and
senior center (Buddy
Rogers Ave)
currently lack
sufficient redundant
power capacity.
Continuity of
Operations,
Public Safety
Public Works,
Fire Dept
FEMA HMGP,
Cal OES
Utility
Mitigation
Grant
1–2 years High Yes
Power Outage
Solar Microgrids
with Battery
Storage
Install solar photovoltaic systems with battery backup
at places like Cathedral City Library, Senior Center,
and designated shelters to support grid-independent
operations.
Community-serving
buildings and shelters
without backup
power, vulnerable
during PSPS and peak
heat outages.
Clean Energy
Resilience, Equity
Community
Development
CPUC
Resilience
Fund, DOE
Renewable
Energy Grant
2–4 years High No
Power Outage
Critical User
Registry &
Wellness
Checks
Maintain and expand database of residents reliant on
powered medical devices for outreach during outages.
Residents relying on
electrically powered
oxygen, refrigeration,
or mobility aids,
especially those in
mobile homes and
affordable housing
units.
Equity, Risk
Communication
Community
Services, IT
FEMA HMGP,
Cal OES
Access &
Functional
Needs
Preparedness
Grants
1 year Medium No
Local Hazard Mitigation Plan Update
257
Power Outage
Public Alert
System
Redundancy
Upgrade emergency messaging systems with solar-
powered signage, radio override, and mobile alert
redundancy for blackout periods.
All residents,
especially
linguistically isolated
or digitally
disconnected
communities during
grid outages.
Emergency
Communication Police, IT
FEMA HMGP,
UASI, Cal OES
Emergency
Comms Funds
1–2 years Medium No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Power Outage
Utility Pole
Vegetation
Management
Program
Collaborate with utilities for vegetation clearance
near power lines in high wind and fire zones.
Overhead utility lines
near Cathedral
Canyon and
Whitewater washes,
among other
locations, with
vegetation intrusion
in high wind/fire
exposure zones
Hazard
Prevention, Grid
Reliability
Public Works,
Utility Agency
CPUC Wildfire
Mitigation
Fund, Cal Fire
Utility
Corridor
Grants
Annual Low No
Earthquake
Soft-Story
Retrofit
Program
Incentivize seismic retrofits for vulnerable soft-story multifamily and commercial buildings.
Older apartment
complexes and
commercial plazas
built before seismic
code updates.
Protect Life,
Prevent Property
Loss
Community
Development
FEMA HMGP,
Cal OES
Earthquake
Grants
1–3 years High Yes
Earthquake
Nonstructural
Seismic Bracing
for Public
Buildings
Anchor bookshelves, HVAC, lighting, and utilities in
libraries, shelters, and schools.
Senior Center, Fire
Station interiors,
school multipurpose
rooms lacking
anchored fixtures or
nonstructural
bracing.
Life Safety,
Operational
Continuity
Public Works,
School District
FEMA HMGP,
Emergency
Management
Performance
Grant
1–2 years Medium Yes
Earthquake
Community-
Based Seismic
Outreach
Campaign
Deliver multilingual workshops, materials, and
shakeout participation for renters, schools, mobile
home parks, and small businesses.
Limited preparedness
knowledge among
renters, LEP
populations, and
small commercial
tenants vulnerable to
shaking impacts.
Public
Awareness,
Preparedness
Fire Dept,
Community
Services
Cal OES,
FEMA
NTHMP
Outreach
Funds
Annual Medium No
Local Hazard Mitigation Plan Update
258
Earthquake
Seismic Early
Warning System
Integration
Link MyShake and ShakeAlert to citywide alert
systems for institutional and public use.
Key facilities (e.g.,
City Hall, Agua
Caliente Elementary,
health centers)
lacking direct early
warning integration
for earthquakes.
Rapid Response,
System Readiness
IT Department,
Police Dept
FEMA HMGP,
USGS
Partnership
Funds
1–2 years Low No
Earthquake
Critical Facility
Retrofit
Prioritization
Study
Identify and prioritize retrofits for key emergency
facilities based on updated risk data.
Fire Stations 411/412,
Civic Center, and
essential water and
wastewater utility
infrastructure.
Continuity of
Government
Public Works,
Engineering
FEMA PA 406
Mitigation,
CEA-
Earthquake
Brace + Bolt
1–2 years Low No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Flooding
Channel and
Culvert
Capacity
Enhancements
Reinforce or upsize undersized culverts and improve
drainage channels near Whitewater River, East Palm
Canyon Drive, and Cathedral Canyon Wash.
Low-lying streets and
neighborhoods near
storm channels,
including east of Date
Palm and Panorama
areas.
Prevent Property
Damage
Public Works,
Engineering
FEMA FMA,
DWR Flood
Control Grants
1–3 years High Yes
Flooding
Green
Infrastructure
Demonstration
Sites
Implement bioswales, rain gardens, and permeable
surfaces at parks and civic sites to demonstrate LID
best practices.
Public lands with
high runoff and
limited infiltration
capacity during
storms.
Reduce Runoff,
Demonstrate
Resilience
Community
Development
State Water
Board SRF,
CalGreen
Implementatio
n Funds
2–3 years Medium No
Flooding
Flood Hazard
Mapping &
Outreach
Update FEMA FIRMs with detailed local data and
conduct bilingual outreach in flood-prone areas,
including mobile home parks and rental communities.
Populations living
near flood channels
and washes with
limited awareness of
flood risk or NFIP
requirements.
Public
Awareness, NFIP
Compliance
Public Works,
Planning
FEMA CTP
Program, Cal
OES Outreach
Grants
1–2 years Medium No
Flooding
Repetitive Loss
Property
Mitigation
Acquire, elevate, or retrofit properties with two or
more NFIP claims to reduce repeated loss and
improve long-term resilience.
Isolated parcels with
multiple flood claims
in lower elevations
near Cathedral
Canyon Channel and
the Whitewater River
system.
Reduce Recurrent
Risk
Community
Development
FEMA FMA,
HUD CDBG-
DR
3–5 years Low No
Local Hazard Mitigation Plan Update
259
Flooding
Evaluate and
Pilot Nature-
Based Flood
Mitigation
Strategies
Study feasibility of restoring or creating wetlands and rewilded green infrastructure at flood-prone areas
such as Los Gatos Rd, DaVall Rd, and the Horizon
neighborhood. Implement pilot projects based on
study findings.
Repetitive flooding in
neighborhoods with
limited drainage and
undeveloped
retention basins.
Reduce Flood
Risk, Improve
Climate
Resilience
Public Works,
CVWD,
Planning, Tribal
Coordination
FEMA FMA,
DWR IRWM,
Cal Fire Urban
Forestry
Grants
1–5 years Medium No
High Wind
Utility Pole
Hardening &
Vegetation
Clearance
Coordinate with SCE to replace wood poles with
composite or steel in storm-prone zones; maintain
clearances.
Aging overhead
infrastructure in areas
with high wind
exposure and
vegetation intrusion
near utility
easements.
Prevent Outages,
Improve Safety
Public Works,
Utility Partners
CPUC
Resilience
Grant, FEMA
HMGP
1–3 years High No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
High Wind
Citywide Tree
Inventory and
Maintenance
Plan
Conduct assessment and replace weak species with
wind-tolerant alternatives.
Weakened or top-
heavy trees along
medians (Date Palm
Dr, Dinah Shore Dr)
and in older
neighborhoods.
Reduce Hazards,
Improve
Resilience
Public Works,
Parks Division
Cal Fire Urban
Forestry,
AQMD Urban
Greening
2 years Medium No
High Wind
Roof Anchoring
and Shutter
Program
Offer financial assistance or rebates for commercial
property owners to install roof anchoring systems and
storm-rated shutters.
Small businesses, strip
malls with aging
roofing systems.
Reduce Structural
Damage
Community
Development
FEMA HMGP,
Local
Incentive
Funds
2–3 years Medium No
High Wind
Emergency
Power for
Traffic Signals
Install solar-powered battery backups at priority
intersections such as Date Palm Drive & Ramon Road
and Dinah Shore Drive & Cathedral Canyon to
maintain traffic control during outages.
Key intersections on
evacuation and
emergency response
routes vulnerable to
high wind-related
power failures.
Safety, Traffic
Continuity
Public Works,
Police Services
FEMA HMGP,
Caltrans
System
Resilience
Fund
1–2 years Low No
High Wind
Public Warning
System
Upgrades
Install durable, weatherproof electronic signage at key corridors and integrate push-alert tools for high wind
and dust storm warnings.
Pedestrian-heavy
areas including
transit stops, school
zones, and outdoor
workspaces with
limited weather
visibility.
Early Warning,
Safety
IT Department,
Fire Dept
FEMA IPAWS,
Cal OES
Emergency
Alert Grants
1–2 years Low No
Local Hazard Mitigation Plan Update
260
Cyberattack
Cybersecurity
Assessment &
Infrastructure
Hardening
Conduct external vulnerability testing and upgrade
firewalls, routers, and municipal servers with
redundant power supplies and secure cloud options.
Citywide IT networks
serving Police, Fire,
permitting systems,
and emergency
dispatch reliant on
legacy infrastructure.
Continuity of
Government,
Risk Reduction
IT Department
FEMA HMGP,
DHS CISA
Cyber
Resilience
Grant
1 year High No
Cyberattack
Multi-Factor
Authentication
and Access
Control
Deploy multi-factor authentication (MFA) protocols
and role-based access tiers for all city-operated digital platforms.
Critical systems
including SCADA,
EOC servers, and
notification systems
with limited current
access controls.
Prevent
Unauthorized
Access
IT Department
FEMA HMGP,
DHS CISA,
State
Cybersecurity
Grants
1 year Medium No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Cyberattack Redundant Data
Backup Systems
Implement geographically diverse, encrypted data
backups with automated syncing for key systems
including law enforcement, permitting, and
emergency services.
Current backups
concentrated on-
premises, increasing
recovery risk in the
event of a cyber or
physical disruption.
Data Integrity,
Disaster Recovery IT, City Clerk
FEMA HMGP,
Cal OES
Emergency
Communicatio
ns Grants
1–2 years 2 No
Cyberattack
Cyber Incident
Response Plan
Development
Develop and adopt a Citywide Cyber Incident
Response Plan that integrates with Cathedral City’s
Emergency Operations Plan (EOP) and outlines
communications protocols and recovery timelines.
Lack of formal cyber
response framework
jeopardizing
coordinated action in
the event of IT
system compromise.
Plan Readiness,
Operational
Continuity
IT, Emergency
Services
FEMA HMGP,
DHS CISA
Technical
Assistance
Program
1 year 3 No
Cyberattack
Citywide
Cybersecurity
Awareness
Campaign
Implement recurring cybersecurity trainings,
phishing tests, and digital hygiene outreach for all
City departments and key vendors.
City staff and
contractors who
access sensitive
systems but may lack
consistent cyber
threat training.
Risk Reduction,
Behavioral
Resilience
IT, Human
Resources
DHS
StopRansomwa
re, FEMA
Emergency
Planning
Funds
Annual 4 No
Pandemic
Public Health
Emergency
Coordination
Annex
Develop a standalone public health emergency annex
to the City’s Emergency Operations Plan, with
protocols for coordination with Riverside County
Department of Public Health.
Citywide population,
including emergency
responders and
medical providers
Plan Integration,
Continuity of
Operations
Fire Dept, Public
Health
FEMA HMGP,
Cal OES
Emergency
1 year 1 No
Local Hazard Mitigation Plan Update
261
lacking integrated
health coordination
protocols.
Planning
Grants
Pandemic
Shelter & Public
Facility
Ventilation
Upgrades
Retrofit HVAC systems in Cathedral City Senior
Center, libraries, and emergency shelters with
MERV-13 filtration and increased outdoor air intake.
Public shelters and
government buildings
serving at-risk groups
lacking modern
ventilation during
airborne disease
outbreaks.
Health
Protection,
Operational
Readiness
Public Works,
Community
Services
FEMA HMGP,
CDC Climate
& Health,
AQMD AB 617
Grants
2–3 years 1 No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Pandemic
City Employee
Continuity of
Operations
(COOP) Plan
Update and test COOP plan with remote work
protocols, cross-training, and secure digital access to maintain operations during infectious disease
emergencies.
Government services
reliant on in-person
operations, with
limited current
provisions for remote
continuity.
Resilience,
Operational
Continuity
City Manager,
HR, IT
FEMA COOP
Planning
Assistance, Cal
OES
Continuity
Program
1–2 years Medium No
Pandemic
Vaccine and
PPE
Distribution
Planning
Pre-designate city buildings (e.g., Cathedral City
Library or Civic Center) as vaccine and PPE
distribution hubs and coordinate with County and
logistics partners.
Populations with
limited healthcare
access, and first
responders lacking
established logistics
for rapid medical
supply distribution.
Public Health
Logistics, Equity
Public Health,
Emergency
Services
FEMA HMGP,
HHS Strategic
National
Stockpile
Program
1 year Medium No
Pandemic
Public Risk
Communication
Strategy
Develop multilingual emergency messaging templates
for social media, radio, and SMS alerts tailored to
pandemic scenarios.
Linguistically isolated
residents, seniors, and
essential workers
needing clear and
timely health
updates.
Equity,
Behavioral
Response
IT, Public Health,
Fire Dept
FEMA IPAWS,
CDC Crisis
Emergency
Risk
Communicatio
n (CERC) Fund
1 year Low No
Landslide
Slope Hazard
Mapping &
Monitoring
Program
Conduct geotechnical assessments and establish
monitoring at high-risk canyon slopes and ridgelines.
Residential areas and
roads built along
elevated ridgelines
with historic erosion
or slide activity.
Risk
Identification,
Prevention
Public Works,
Engineering
FEMA HMGP,
Cal OES
Geohazards
Program
1–2 years High No
Local Hazard Mitigation Plan Update
262
Landslide
Slope
Stabilization for
Critical
Infrastructure
Stabilize and reinforce slopes supporting
infrastructure near flood-prone washes, sewer lines,
and hillside roadways.
Essential
infrastructure at risk
of failure due to slope
instability, especially
post-storm or seismic
events.
Infrastructure
Protection, Life
Safety
Public Works
FEMA HMGP,
State Highway
Slope
Protection
Program
2–4 years High No
Landslide
Erosion Control
and Vegetative
Stabilization
Apply native vegetation, straw wattles, jute netting,
and other soil stabilization measures to wildfire burn
scars and steep natural slopes.
Wildland-urban
interface areas where
post-burn slopes are
exposed to
accelerated erosion
and debris flow.
Nature-Based
Mitigation, Soil
Stabilization
Parks, Public
Works
NRCS EQIP,
Cal Fire Fire
Recovery
Grants
2 years Medium No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Landslide
Development
Review
Protocols in
Hazard Zones
Update municipal zoning code and review checklists
to require detailed geotechnical studies in high-slope
areas.
Undeveloped parcels
on slopes where
development could
trigger or worsen
instability without
adequate design
review.
Risk Avoidance,
Long-Term
Mitigation
Community
Development
Local
Resources, Cal
OES Planning
Assistance
Ongoing Low No
Landslide
Post-Storm
Slope Inspection
and Response
Plan
Develop a post-storm and post-earthquake rapid
inspection protocol for slopes in hillside zones,
including deployment checklists, safety criteria, and
inspection team responsibilities.
Sloped areas
vulnerable to
landslide or debris
flow, and first
responders requiring
standardized post-
event slope
assessment guidance.
Rapid Risk
Evaluation,
Public Safety
Public Works,
Fire Dept
FEMA HMGP,
Cal OES
Emergency
Management
Planning
Grant
1 year Low No
Sandstorms
Roadway
Blowsand
Maintenance
Program
Implement a proactive cleaning and inspection
schedule for sand accumulation zones like Varner
Road, Ramon Road, and Vista Chino.
Transportation
corridors and
emergency routes
frequently blocked by
sand deposits and low
visibility.
Traffic Safety,
Emergency
Access
Public Works
Caltrans
Maintenance
Assistance
Program,
CPUC
Resilience
Fund
Annual High No
Sandstorms
Blowsand
Vegetative
Buffer
Installation
Install vegetative windbreaks (e.g., mesquite,
creosote) in eastern Cathedral City along major sand
migration corridors.
East-facing
neighborhoods and
roadways (e.g., Rio
Vista, Date Palm
Infrastructure
Protection,
Erosion Control
Public Works,
Community
Development
DWR Urban
Streams, Cal
Fire Urban
Forestry,
2–4 years Medium No
Local Hazard Mitigation Plan Update
263
Drive) with high
exposure to
windblown sand.
CVAG
Blowsand
Mitigation
Sandstorms
Sandstorm
Visibility Alert
Integration
Integrate sandstorm/haboob warnings into IPAWS
and citywide mobile alerting platforms using AQMD
PM10 and NOAA wind data.
Drivers, pedestrians,
and outdoor workers
exposed to rapid
visibility loss during
haboob events.
Risk
Communication,
Public Safety
IT, Emergency
Services
FEMA IPAWS,
Cal OES Public
Alert &
Warning
1–2 years Medium No
Hazard Action Description Vulnerability Goals Coordinating Agency
Funding
Source Timeline Priority
In 2018
LHMP
Update?
Transportation
Disruptions
Emergency
Evacuation
Route
Redundancy
Plan
Identify and pre-plan alternate evacuation routes
using GIS analysis; test routes annually under
simulated closure scenarios.
Neighborhoods with
only one major access
point or dependence
on I-10 and CA-111
for regional
evacuation.
Continuity of
Operations,
Public Safety
Fire Dept, Police,
Public Works
FEMA HMGP,
Cal OES
Evacuation
Route Grant
1–2 years High No
Transportation
Disruptions
Critical
Intersection
Resilience
Upgrades
Retrofit flood- or quake-prone intersections such as
Dinah Shore at Cathedral Canyon to improve
emergency egress capacity.
Lifeline intersections
critical for emergency
access and daily
commuter flow.
Infrastructure
Resilience, Public
Safety
Public Works
Caltrans
System
Resilience
Fund
2–4 years Medium No
Transportation
Disruptions
Flood-Resistant
Transit
Infrastructure
Retrofits
Elevate or relocate vulnerable SunLine bus stops and
staging areas affected during Tropical Storm Hilary.
Transit-dependent
populations,
especially seniors and
low-income
residents, stranded
during floods.
Transportation
Equity,
Continuity
Public Works,
SunLine
Caltrans ATP,
FEMA FMA 1–3 years Medium No
Transportation
Disruptions
Airport
Emergency
Coordination
Protocols
Integrate Palm Springs Airport emergency response
plans with Cathedral City’s EOP for crash or closure
scenarios.
Air traffic-related
incidents impacting
Cathedral Canyon
corridor and adjacent
land uses.
Interagency
Coordination,
Public Safety
Emergency
Services, Police,
Airport Partners
FEMA HMGP,
DHS Critical
Infrastructure
Protection
1 year Low No
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6.4 Status of Prior Mitigation Actions
Mitigation Action Item 2018 LHMP Comments and
Status Reason for Not Being Included
Eagle Canyon Dam Project
Completion
Completed in 2015 as a major flood
mitigation effort along East Palm
Canyon Drive
Project already completed; does not require
inclusion in new mitigation actions
Cathedral Canyon Drive Bridge over
Whitewater Channel
Scheduled in 2017; identified as high
priority to support evacuation and
mitigate flood hazard
Project completed in 2018 using local and federal
funds; no further action required
Replace Collapsed Storm Drains (24"
and 15")
Identified as a high-priority project due
to street flooding and infrastructure
damage
Completed and integrated into ongoing Public
Works maintenance; new actions will build upon
these upgrades
Cooling Centers for Extreme Heat Ongoing; Senior Center, EOC, and schools designated as cooling centers
Program institutionalized; further improvements
to cooling infrastructure addressed under new
plan actions
CERT and Teen CERT Expansion
Ongoing; supported through annual
outreach and public training by
Cathedral City Fire Department
Maintained as continuous program; specific
expansion efforts to be updated in future LHMP
actions
Escarpment Stabilization along East
Palm Canyon Drive
Identified as a unique earthquake-
triggered landslide hazard near Rancho
Mirage border
Under long-term interagency review; not yet
scoped for city-led mitigation project funding
Drought Resilience via Water
Management Planning
Called for integrated water and
groundwater planning
Strategy embedded into regional water agency
coordination; future actions will emphasize
regional water reliability partnerships
Storm Drain Master Plan
Implementation
Addressed citywide flooding risks
through phased projects on Ramon, Date
Palm, Vista Chino, and Varner
Many components completed; future phases and
retrofits to be addressed under 2025 LHMP
project list
Seismic Risk Awareness and
Community Outreach
Education through CERT and
community events
Maintained as standing outreach priority; future
actions will focus on public-facing seismic retrofit
incentives
City-Owned Emergency Water Tank Mentioned in stakeholder discussions Deferred due to operational cost and regional
mutual aid agreements for potable water
provision
Rockslide Risk Monitoring – East
Palm Canyon Escarpment
Escarpment described as a landslide risk
post-earthquake
No monitoring program established to date;
future monitoring to be integrated into state or
regional landslide assessments
Coordination with State Dam Safety
Division
Ongoing coordination regarding dam
inspection timelines
Addressed as standard practice; not included as
new mitigation action unless city jurisdiction
over dams changes
Wind Hazard Public Warning and
Road Closure Protocols
Supported by Police and Public Works
during wind events
Ongoing operational procedure; new mitigation
actions will evaluate early warning system
upgrades
Non-Structural Mitigation of City
Facilities
Includes securing of equipment,
furniture, and files to prevent injury and
damage
Ongoing facility-by-facility basis; new actions to
assess critical infrastructure retrofits
comprehensively
Mitigation Action Item
2018 LHMP Comments and
Status
Reason for Not Being Included
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Vulnerability Assessments of Public
Infrastructure
Facilities assessed for flood, heat, and
seismic vulnerability
Integrated into CIP process; updated evaluations
to inform 2025 mitigation priorities
Seismic Building Code Enforcement Adoption of 2016 California Building and Fire Codes
Continues under Community Development
Department oversight; will remain baseline for
future mitigation
Highway 111 Escarpment Abatement
(in partnership with Rancho Mirage
& CVAG)
In planning stages as of 2017
No formal project scoped or funded as of 2025;
included in future hazards for potential
mitigation
Emergency Operations Coordination
and Planning
Includes NIMS compliance, updated
Emergency Operations Plan
EOP and interagency coordination continuously
updated; tracked separately from mitigation
action list
Mutual/Automatic Aid Agreements Maintained with Palm Springs and Riverside County Fire Departments
Standard operating agreement; not a discrete
mitigation project
Upgrade of Communications and
Interoperability Systems
Suggested for multi-agency disaster
response
Partially addressed through regional investments;
next steps to be outlined under future mitigation
planning
Maintenance of Drainage Plans and
Integration with Development
Review
Stormwater BMPs included in plan
updates and permitting
Ongoing via Planning Department; not included
as stand-alone mitigation action
Continued CERT Recruitment and
Public Education Campaigns
Recruitment and training conducted
annually
Continues as a standing program; future LHMP
will include multilingual outreach and equity-
focused engagement
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6.5 Actions Considered but Not Included
Hazard Mitigation Action
Item
2018 LHMP
Timeline
2018 LHMP Comments
and Status
Current Status (as of 2025
LHMP Update)
Flooding Eagle Canyon Dam
Project Completion
Completed
before 2017
Completed in 2015 as major
flood mitigation project
No longer an active mitigation need;
omitted from 2025 plan
Flooding
Cathedral Canyon Drive
Bridge over Whitewater
Channel
1–3 years
Completed in 2018; major
evacuation and flood access
corridor improvement
Retired from action list due to
completion
Flooding Replace Collapsed Storm
Drains (24" and 15") 1–2 years Identified as a priority due to recurring street flooding
Integrated into storm drain upgrades;
not listed as a separate action in 2025
plan
Extreme
Heat
Cooling Centers for
Extreme Heat Ongoing
Designated sites include
Senior Center, Library, and
EOC
Now institutionalized as part of
resilience hubs; not included as
standalone action
Multi-
Hazard
CERT and Teen CERT
Expansion Ongoing Maintained through Cathedral
City Fire Department outreach
Continued as part of annual public
education programming; not a
discrete mitigation project
Landslide
Escarpment Stabilization
along East Palm Canyon
Drive
3–5 years Considered due to earthquake-
induced rockfall risks
Not scoped or funded as a mitigation
action; to be addressed in future
geotechnical assessments
Drought City-Owned Emergency
Water Tank 3–5 years
Considered but deferred due
to maintenance and cost
concerns
Not included; potable water
redundancy addressed via regional
coordination with DWA
Landslide
Rockslide Risk
Monitoring – East Palm
Canyon Escarpment
3–5 years No formal monitoring
program developed
Deferred again; requires interagency
coordination and technical support
Drought
Drought Resilience via
Water Management
Planning
1–3 years
Incorporated into DWA
planning and regional
conservation programs
Now part of external agency-led
efforts; not included in city's 2025
mitigation list
Flooding Coordination with State
Dam Safety Division Ongoing Routine inspection
coordination
No local jurisdiction over dams; not
appropriate as a Cathedral City
mitigation action
Flooding
Conduct outreach to
businesses in minor flood
areas
1–2 years Deferred due to staff capacity
limitations
Superseded by broader risk
communication and outreach
strategies in 2025 plan
Earthquake
Emergency water tank
for post-disaster water
supply
3–5 years
Evaluated; determined
infeasible due to operational
costs
Addressed through mutual aid water
provisions; not included as a
standalone action
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6.6 Implementation & Monitoring
Prioritization Criteria
Drawing in part from the STAPLEE method (Social, Technical, Administrative, Political, Legal, Economic, Environmental), the prioritization process for this LHMP’s mitigation strategies included evaluation across several key criteria:
• Anticipated risk reduction
• Technical feasibility
• Cost-benefit considerations
• City implementation capacity
• Co-benefits
• Alignment with local planning goals and existing program priorities These considerations were ultimately summarized using a simplified scoring approach. Each mitigation action received a subjective score on a 1 –3 numeric scale, where:
1 = High Priority, 2 = Medium Priority, and 3 = Low Priority. These numeric scores were then translated into standardized ranking titles (“High,” “Medium,” or “Low”) to ensure consistency across plan sections. This simplified presentation was designed to reduce complexity and make the menu of mitigation options more accessible and user-friendly.
The LHMP is intended not only to support funding applications for specific projects, but also to guide elected officials and staff in integrating mitigation into broader city government processes. Presenting these strategies in a clear, straightforward manner directly supports that goal.
Responsible Agencies & Implementation
The successful execution of the Cathedral City Local Hazard Mitigation Plan Update requires coordinated action among multiple city departments, regional partners, and state and federal agencies.
This section outlines the designated lead and supporting agen cies for implementation, as well as anticipated timelines for initiation and completion of mitigation actions.
The Cathedral City Fire Department (CCFD) serves as the lead agency for overall emergency management, disaster mitigation, and plan coordination. CCFD leads preparedness planning and directs community disaster training. CCFD is responsible for tracking the overall implementation of mitigation actions, maintaining the LHMP, and coordinating with external partners such as Cal OES, FEMA, and Riverside County.
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• Cathedral City Fire Department (CCFD): LHMP coordination and annual progress tracking, emergency preparedness planning, public education and CERT training, fire prevention, hazardous materials mitigation, dispatch operations, and regional mutual aid coordination. • Cathedral City Police Department (CCPD): Emergency evacuations, traffic management, and public safety operations; critical infrastructure protection and public communications during disasters; law enforcement coordination for terrorism, civil unrest, and multi-hazard incidents; joint dispatch with Fire Department.
• Public Works Department: Post-disaster debris removal, road clearance, and utility coordination; infrastructure restoration projects; oversight of the Capital Improvement Program (CIP) in collaboration with Engineering.
• Capital Projects & Engineering Division (under Public Works): Design and delivery of seismic retrofit, stormwater, and transportation resilience projects; evacuation route planning and resilient infrastructure design; technical review of funding applications. • Community and Economic Development Department (CEDD): Includes Planning, Building & Safety, Code Enforcement, and Economic Development.
• Planning Division: Land use and zoning policy–based mitigation; integration of General Plan Safety Element priorities.
• Building Division: Enforcement of California Building Code seismic and floodplain standards; post-disaster safety assessments of buildings and structures. • Code Enforcement: Enforcement of city municipal codes, including those related to nuisance abatement, occupancy safety, and structural integrity. • Economic Development: Supports resilience of commercial and industrial sectors and encourages investment in risk-reduction upgrades.
Each mitigation action identified in Section 6.3 – Mitigation Action Plan Table includes:
• A responsible coordinating agency (lead)
• Supporting agencies where applicable
• A proposed implementation timeframe, categorized as:
• Short-Term (0–1 year)
• Mid-Term (1–3 years)
• Long-Term (3–5 years)
• Ongoing (recurring or policy-based actions)
Mitigation actions will be integrated into the City’s Capital Improvement Plan (CIP), Annual Departmental Budgets, and the Emergency Operations Plan (EOP) as appropriate.
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barriers, identify funding opportunities (e.g., FEMA HMGP, FMA, Cal OES programs), and adjust timelines and responsibilities as needed.
Performance Metrics & Reporting
To ensure accountability and measure progress, the City will track the implementation of each mitigation action using specific performance metrics. These will be reviewed and updated during regular plan maintenance and during funding application development.
Performance monitoring will be structured around the following indicators:
• Implementation Milestones: Completion of key steps such as feasibility studies, grant applications, design, permitting, and construction.
• Project Completion Rate: Percentage of total actions initiated and completed within each 5 - year LHMP cycle.
• Funding Leveraged: Amount of federal, state, and local funding secured for mitigation implementation (e.g., FEMA HMGP, Cal OES, CPUC).
• Risk Reduction Achieved: Quantitative and qualitative reductions in risk, such as:
• Number of critical facilities retrofitted.
• Square footage of stormwater improvements.
• Number of households reached through outreach or served by resilience programs. • Community Engagement: Number of participants in mitigation-related outreach, trainings, and workshops.
• Equity Metrics: Percentage of actions implemented in CalEnviroScreen -designated disadvantaged communities or benefiting socially vulnerable populations.
Reporting will occur through three key mechanisms:
• Annual Mitigation Implementation Review Memo: Each year, the Cathedral City Fire Department will compile a memo summarizing:
• Actions completed or initiated.
• Any delays or constraints encountered.
• Upcoming priorities and funding needs.
• A status summary of each mitigation action (not started, in progress, completed, deferred).
• FEMA 5-Year LHMP Update Cycle Reporting : At the start of each LHMP update cycle, the City will conduct a comprehensive evaluation of:
• All mitigation actions from the prior plan.
• Quantitative progress on metrics.
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• Revised priorities based on new data and risk assessments. • Documentation of actions completed, revised, or not implemented, with justifications. • Grant Reporting and Post-Award Performance Tracking: For all mitigation projects funded by external sources (e.g., FEMA, Cal OES), the City will comply with federal and state performance monitoring requirements, including quarterly progress reports, cost tracking, benefit-cost validation (as applicable), and outcome summaries. •
SECTION 7 – PLANNING, MAINTENANCE AND
ADOPTION
Element A Requirements
A1. Does the plan document the planning process, including how it was prepared and who was involved in the process for each jurisdiction? (Requirement 44 CFR § 201.6(c)(1)) A2. Does the plan document an opportunity for neighboring communities, local and regional agencies involved in hazard mitigation activities, and agencies that have the authority to regulate development, as well as businesses, academia, and other private and non-profit interests to be involved in the planning process? (Requirement 44 CFR § 201.6(b)(2))
A3. Does the plan document how the public was involved in the planning process during the drafting stage and prior to plan approval? (Requirement 44 CFR § 201.6(b)(1)) A4. Does the plan describe the review and incorporation of existing plans, studies, reports, and technical information? (Requirement 44 CFR § 201.6(b)(3))
7.1 Planning Process
Cathedral City’ Local Hazard Mitigation Plan (LHMP) is designed to meet the requirements of the Disaster Mitigation Act of 2000 (DMA 2000) and to ensure that the City of Cathedral City is eligible for all appropriate benefits under state and federal law and practices. The LHMP planning process considers natural and human-caused hazards facing the City, ensuring compliance with all FEMA and Cal OES guidance and supporting plan review and approval.
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The LHMP planning team gathered information from a variety of sources, including participating municipal departments, local organizations and utilities, regional planning agencies, and residents of Cathedral City. Hazard mitigation strategies were develope d through an extensive, iterative process involving internal subject matter experts and external stakeholder feedback.
As listed on page 4 of this Plan, the Planning Team consisted of:
Fire Department
Michael Contreras – Fire Chief
Stakeholder Group
Robert Bradbury -Director of Emergency Services, Agua Caliente Band of Cahuilla Indians Laura James – Chief Executive Officer, Coachella Valley Economic Partnership Angelique Ontiveros – Vice President, Business Development, Desert Arc Gregory Papazian – Emergency Management & Safety Administrator, Coachella Valley Water District Jacob Green and Associates
Patrick Marchman, AICP, SCR, Project Manager
The planning process began with a kickoff meeting in October 2024. The consultants (JGA) worked closely with the planning team, with bi-weekly check-ins throughout the process. Hazards workshops took place in December 2024 involving both members of the Stakeholder Committee and the Planning Team. Two public meetings were subsequently held in January 2025, one in-person and one virtual to maximize opportunities for participation.
Sections of the draft plan were made available for review to the City and the Stakeholder committee at various times throughout the process, and the completed draft was made available for review in May 2025.
The Planning Team incorporated comments into a Final Draft Plan , which was submitted to Cal OES and FEMA Region IX for review and conditional approval . Following incorporation of mandated Local Hazard Mitigation Plan Update
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revisions, the Plan was returned to Cal OES and FEMA on DATE TO BE DETERMINED for formal approval. The final FEMA -approved LHMP was presented to the City Council for adoption by resolution on DATE TO BE DETERMINED. A copy of the adoption resolution was forwarded to FEMA for formal acknowledgment and record.
The planning area for this LHMP includes the entire jurisdictional boundary of the City of Cathedral City. The risk assessment was conducted for this complete area and includes analysis of hazard exposure, probability, and vulnerability for both current and future conditions, in accordance with 44 CFR §201.6(c)(2). All Planning Team members, with the exception of outside technical consultants, were affiliated with the City of Cathedral City. Coordination occurred
through a series of dedicated planning meetings, internal work sessions, and standing project check - ins to ensure consistency and interdepartmental alignment.
The Planning Team compiled a comprehensive stakeholder contact list across multiple sectors and agencies, inviting their participation throughout the planning process. Neighboring jurisdictions and school districts were also contacted following completion of the Plan.
In compliance with 44 CFR §201.6(b)(3), the planning process incorporated existing plans, studies, and technical resources relevant to Cathedral City. The following documents were reviewed and referenced:
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Plan / Document Description
Cathedral City LHMP
(Update in Progress)
Served as the baseline hazard mitigation document, including hazard profiles, vulnerability summaries, and previously prioritized actions.
Cathedral City 2040 General
Plan & Elements
Provided demographic, land use, infrastructure, and environmental context for the updated risk assessment and capability analysis. The Safety, Land Use, Housing, Environmental Justice, and Conservation and Open Space Elements were especially critical to hazard identification and prioritization. 2023 California State Hazard
Mitigation Plan (Cal OES)
Used to ensure consistency with state hazard profiles, climate adaptation integration, and mitigation funding priorities.
Riverside County Multi-
Jurisdictional Hazard
Mitigation Plan (2023)
Provided cross-jurisdictional hazard context and regional coordination frameworks for hazards such as flooding, drought, and seismic activity.
California’s Fourth Climate
Change Assessment – Inland
Deserts Region Report
Offered scientific projections for extreme heat, water stress, wildfire, and regional climate change indicators relevant to Cathedral City.
Coachella Valley Multiple
Species Habitat Conservation
Plan (CVMSHCP)
Informed ecological resilience strategies and regional habitat protections linked to wildfire, drought, and heat mitigation.
SCAG Connect SoCal 2024
RTP/SCS and Sustainability
Planning Resources
Supported integration of transportation resilience, housing risk, and regional mitigation co-benefits.
Other external resources included data from commercial climate risk providers and technical assistance from the California Office of Emergency Services (Cal OES). These materials were used in the risk assessment, capability analysis, and mitigation strategy sections.
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7.2 Plan Update
Element E: Plan Update Requirements
E1. Was the plan revised to reflect changes in development? (Requirement 44 CFR § 201.6(d)(3))
E2. Was the plan revised to reflect changes in priorities and progress in local mitigation efforts? (Requirement 44 CFR § 201.6(d)(3))
The City of Cathedral City’s previous LHMP update was completed in 2018. This 2025 update uses data from the U.S. Census Bureau, SCAG Local Profile (2023), and the recently adopted Cathedral City 2040 General Plan to examine how development trends and demographic changes impact the City’s hazard vulnerabilities-particularly for low -income residents, unhoused persons, elderly adults, disabled persons, and linguistically isolated households. Further information on land use, infrastructure, and community conditions can be found in Section 2.
This update to the City’s LHMP represents a comprehensive plan revision, integrating updated risk data, expanded hazard profiles, and new planning requirements , as well as changes in community priorities. It reflects and operationalizes the most recent FEMA mitigation planning guidance (April 2023) and Cal OES climate and equity criteria. This LHMP update incorporates projected climate change impacts into every relevant hazard profile to more accurately describe how temperature rise, precipitation shifts, and wildfire risk may evolve. These insights are also reflected in proposed mitigation actions to advance community adaptation and resilience.
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7.3 Stakeholder Involvement
Stakeholders were involved at multiple stages in the plan development process. As part of the initial research and analysis setting the foundation for the Plan, documents from not only the City of Cathedral City but also from neighboring jurisdictions and regional planning partners were used to inform the Plan’s context development. Stakeholders were contacted via email invitations, telephone calls, and in some cases direct in-person outreach conducted by City staff and the planning consultant team to ensure comprehensive engagement.
Meetings of the core planning team were held biweekly and as otherwise required throughout the project.
Local and regional agencies involved in hazard mitigation activities • Southern California Association of Governments (SCAG) • Riverside County Emergency Management Department
Agencies that have the authority to regulate development • Cathedral City Community Development Department
Neighboring communities
• Copies of the initial draft LHMP were sent for review and comment to the cities of:
• City of Palm Springs
• City of Rancho Mirage
• City of Desert Hot Springs
• City of Palm Desert
• Agua Caliente Band of Cahuilla Indians
Representatives of businesses, academia, and other private organizations • Outreach was conducted to entities with relevant technical knowledge and major local employers, including:
• Southern California Edison
• SoCalGas
• Cathedral City Chamber of Commerce
• College of the Desert – School of Applied Sciences
• SunLine Transit Agency
Representatives of nonprofit organizations, including community -based organizations that work directly with and/or provide support to underserved communities and socially vulnerable populations • Outreach was conducted to the following organizations:
• Lift to Rise
• United Way of the Desert
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• Coachella Valley Housing Coalition
• Jewish Family Service of the Desert
• Catholic Charities San Bernardino & Riverside Counties • Boys & Girls Club of Cathedral City
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7.4 Public Involvement
The City of Cathedral City provided members of the public several opportunities to participate in the planning, design, and review phases of the Local Hazard Mitigation Plan (LHMP). In addition, members of the public, local commissioners, and City Council members were given the opportunity to provide input and recommendations verbally, through emails, and via digital comment forms.
Public outreach for input on the Plan took place in several formats, including online, in print, and in person:
• A multilingual community survey in English and Spanish was made available on the City’s website through February 2025, allowing residents to share their experiences and perspectives regarding hazards affecting the City and potential actions to reduce risk. • Notifications and survey links were posted on the City’s website and on social media platforms. • A virtual Hazards Workshop was held in December 2024, engaging residents, community - based organizations, and regional partners.
• An in-person public meeting was held in January 2025 along with a virtual workshop using the same content and presentation format as the in -person workshop, allowing community members to participate remotely and provide live feedback. • The Draft LHMP was published to the City’s website in May 2025 for a two -week public comment period, and comments received were reviewed and integrated into the final draft.
Survey results summaries are included in the Appendices to the Plan, alongside printed and digital notification examples and outreach materials posted on social media and the City of Cathedral City’s website.
Public and stakeholder involvement was meaningful and influential in shaping the Plan. Feedback directly informed the refinement of several mitigation actions and the prioritization of specific hazards – the Coachella Valley Water District contributed comments to the discussion of drought as a hazard as well as to the understanding of Cathedral City’s water infrastructure.
Copies of the final LHMP Update will be catalogued and made available at Cathedral City Hall, the Cathedral City Branch of the Riverside County Library (33520 Date Palm Drive), and the Planning Division at City Hall. The existence and locations of these co pies will be publicized via the City’s website and social media channels. A copy of the Plan and any proposed amendments will remain available on the City’s website throughout the Plan's lifecycle. The website will also include a designated email address a nd phone number for ongoing public comment, recommendations, and inquiries.
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The Hazard Mitigation Coordinator, designated within the Cathedral City Fire Department (CCFD), will work with other City departments to create opportunities for public involvement throughout the Plan's five-year cycle. These opportunities may include outreach through existing public meetings (e.g., safety open houses, Desert Recreation District programs, CERT events, and preparedness workshops) as well as regular updates to City Council during public sessions.
Specific annual events and outreach channels identified to promote public involvement in hazard mitigation planning include:
• National Fire Protection Association Fire Prevention Week • Earthquake Preparedness Month (October)
7.5 Plan Incorporation
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The City of Cathedral City addresses statewide planning goals and legislative requirements through its 2040 General Plan, Capital Improvement Program (CIP), Municipal Code, and Building and Safety Regulations. The Local Hazard Mitigation Plan (LHMP) provid es a series of recommendations, many of which align closely with the goals and objectives of these existing plans and programs. The City incorporates recommended LHMP mitigation actions through established procedures to ensure that hazard mitigation remains an integral and ongoing part of city planning and investment efforts.
The 2018 Cathedral City LHMP was previously referenced in the Safety Element of the General Plan.
In this 2025 update, the LHMP has been developed to take into account and ultimately incorporated by reference into the updated Cathedral City 2040 General Plan in compliance with California Senate Bill 379 (SB 379), which requires local jurisdictions to incorporate climate adaptation and resilience strategies into their Safety Elements based on the most current LHMP.
The Safety Element (2024) references th e 2018 LHMP Update, consistent with state guidance. In parallel, planning mechanisms such as the CIP, Housing Element, Environmental Justice Element, and Conservation and Open Space Element are mechanisms to incorporate LHMP content where hazard exposure, infrastructure investment, and resilience are directly relevant.
The Planning Division within the Community and Economic Development Department is responsible for enforcing the California Building Standards Code, ensuring hazard -resistant design in accordance with seismic, floodplain, wildfire, and energy efficiency reg ulations. The Department -which also includes Building & Safety and Code Enforcement -collaborates with state agencies and regional partners to ensure building safety regulations reflect evolving climate and hazard risks. This process ensures that life-safety criteria are met for all new construction and substantial renovations.
Some of the LHMP’s goals and mitigation actions will be implemented through projects and priorities listed in the Capital Improvement Program, including infrastructure upgrades, facility retrofits, and green infrastructure investments. City departments -including Public Works, Engineering, and Planning-develop and review the CIP annually. During this annual CIP review cycle, the Hazard Mitigation Coordinator will coordinate with City departments to assess where LHMP actions align with CIP goals and identify opportunities for incorporation.
Upon FEMA approval of the LHMP, the Hazard Mitigation Coordinator will initiate a structured integration process to embed the LHMP’s strategies into relevant City plans and programs. The Hazard Mitigation Coordinator will review and evaluate annually to:
•
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• Track the integration of mitigation strategies into General Plan implementation, CIP updates, housing and zoning policy, and community investment decisions; • Ensure consistency between mitigation actions and Citywide goals for resilience and public safety;
• Monitor and document progress toward LHMP implementation; and • Recommend updates or adjustments to improve integration and effectiveness.
7.6 Monitoring, Evaluating and Updating the Plan
Element D: Plan Maintenance Requirements
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D1. Is there discussion of how each community will continue public participation in the plan maintenance process? (Requirement 44 CFR § 201.6(c)(4)(iii)) D2. Is there a description of the method and schedule for keeping the plan current (monitoring, evaluating, and updating the mitigation plan within a five-year cycle)? (Requirement 44 CFR § 201.6(c)(4)(i))
D3. Does the plan describe a process by which each community will integrate the requirements of the mitigation plan into other planning mechanisms, such as comprehensive or capital improvement plans, when appropriate? (Requirement 44 CFR § 201.6(c)(4)(ii))
Monitoring
Under the direction of the Hazard Mitigation Coordinator within the Cathedral City Fire Department (CCFD), the Cathedral City Hazard Mitigation Planning Team will take responsibility for Plan maintenance and implementation. The Hazard Mitigation Coordinator will facilitate annual Planning Team meetings, assign tasks, and ensure that progress on implementation and integration is tracked consistently. This individual will maintain a yearly record of necessary updates to ensure the LHMP reflects the most current hazard data, completed actions, and planning priorities.
The Hazard Mitigation Coordinator will also coordinate with relevant City departments -including Public Works, the Community Development Department (Planning, Building & Safety, Code Enforcement, and Economic Development), Fire, Police, and Engineering -to t rack progress on mitigation actions and support alignment with other planning mechanisms (e.g., 2040 General Plan Implementation Program, Capital Improvement Plan [CIP], and Emergency Operations Plan [EOP]).
Plan implementation and evaluation will remain a shared responsibility among all members of the Planning Team.
The Hazard Mitigation Coordinator will also collaborate with City leadership, including the City Manager’s Office and Finance Department, to secure funding and support for the required five -year update cycle, in accordance with FEMA and Cal OES regulations.
The Planning Team will meet at least once per year to review action status, coordinate interdepartmental implementation, and identify any necessary modifications. These meetings will be scheduled annually following the confirmation of Planning Team represe ntatives. The Hazard Local Hazard Mitigation Plan Update
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Mitigation Coordinator will be authorized to reassign or designate new Planning Team members as needed.
Evaluating
The LHMP will be formally evaluated on an annual basis to assess the effectiveness of existing actions and determine whether changes in development patterns, hazard conditions, or state and federal policies require updates to mitigation priorities. This an nual evaluation will follow a consistent schedule and will be led by the Hazard Mitigation Coordinator, who will convene and facilitate the evaluation meeting.
During the evaluation, the Planning Team will review:
• The continued relevance of goals and mitigation actions; • New or emerging hazards based on updated science or local experience; • Implementation status of current mitigation actions;
• Progress and setbacks in interagency collaboration.
Each coordinating department will be asked to report on:
• Successes in implementation
• Challenges or barriers encountered
• Lessons learned or recommended revisions
• Interagency coordination performance
If plan revisions are needed, the Hazard Mitigation Coordinator will assign responsible Planning Team members to draft and circulate those changes within three months. All updates will be distributed to City departments, external plan partners, and posted on the Cathedral City website. Substantial revisions will be tracked for incorporation into the next full plan update.
Each annual Planning Team meeting will also include a review of:
• Any changes in the nature or magnitude of identified risks • The current status of mitigation actions
• Ongoing or new challenges encountered during implementation • Adjustments to strategies based on changing community needs, funding, or guidance The evaluation process will include outreach to key internal and external stakeholders such as:
• Neighborhood associations and HOA representatives
• Cathedral City Police and Fire personnel
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• Faith-based organizations and local nonprofits
• Social service providers, including housing and senior services • Staff from Public Works, Engineering, and Community Development These stakeholders will provide updates on community conditions, equity considerations, and hazard mitigation needs to help inform responsive and inclusive plan improvements.
Updating
The Hazard Mitigation Coordinator will oversee ongoing monitoring and annual evaluation to support timely identification of grant opportunities and alignment with City budgeting cycles. Following adoption of the annual budget by the City Council, the Hazard Mitigation Coordinator will collaborate with the Planning Team and applicable departments to pursue state and federal mitigation funding, including FEMA’s Hazard Mitigation Grant Program (HMGP) and Cal OES Resilience Grants.
Beginning in Year Four of the five -year LHMP lifecycle, the Hazard Mitigation Coordinator will initiate the formal update process in accordance with 44 CFR §201.6(d)(3). The revised LHMP will be submitted to Cal OES and FEMA for review and approval and wil l subsequently be adopted by resolution of the City Council.
Public engagement will be a critical component of the update. Citywide meetings will be advertised through a combination of social media, website notifications, direct outreach, and public postings, with special emphasis on reaching:
• Low-income and linguistically isolated residents
• Elderly and persons with access and functional needs
• Community-based and service organizations
• Youth, seniors, and participants in Desert Recreation District programs The updated LHMP will be made available:
• Online via the City of Cathedral City’s website
• Physically at City Hall and the Cathedral City Public Library • By request through the Planning Division or Cathedral City Fire Department – Emergency Services
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7.7 Plan Adoption
Element F: Plan Adoption
F1. For single-jurisdictional plans, has the governing body of the jurisdiction formally adopted the plan to be eligible for certain FEMA assistance? (Requirement 44 CFR § 201.6(c)(5))
F2. For multi-jurisdictional plans, has the governing body of each jurisdiction officially adopted the plan to be eligible for certain FEMA assistance? (Requirement 44 CFR § 201.6(c)(5))
Adoption of the Local Hazard Mitigation Plan by the City’s governing body is a core requirement for FEMA and Cal OES approval. Once the Plan is conditionally approved by FEMA and finalized, the City Council will be responsible for formally adopting the Mit igation Plan by resolution. The governing body holds the authority to promote sound public policy around hazard mitigation, resilience, and emergency preparedness.
The City Council will retain authority to update or amend the Plan as needed to reflect changes in local hazard risks, exposures, regulatory requirements, and community needs. Once adopted, the approved LHMP will serve as a foundational policy document, gu iding hazard mitigation investments and influencing future growth, infrastructure improvements, and climate resilience strategies.
On [TO BE COMPLETED WITH FINAL DATE], during a regularly scheduled public meeting, the Cathedral City City Council formally adopted the Cathedral City Local Hazard Mitigation Plan (2025 Update). The City Council resolution of adoption is provided in the Appendices of this Plan.
Primary Point of Contact
Michael Contreras
Chief, Cathedral City Fire Department
City of Cathedral City
32100 Desert Vista Road
Cathedral City, CA 92234
Phone: (760) 770-0300
Email: [email protected]
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APPENDICES
Appendix A: Sample Adoption Resolution
Note to Reviewers : When this plan has been reviewed and approved pending adoption by FEMA Region IX, the adoption resolutions will be signed added to this appendix.
Sample Resolution: City of Cathedral City
Resolution # ______
Adopting the City of Cathedral City Hazard Mitigation Plan WHEREAS, The City of Cathedral City recognizes the threat that natural and manmade hazards pose to people and property within our community; and
WHEREAS, undertaking hazard mitigation actions will reduce the potential for harm to people and property from future hazard occurrences; and
WHEREAS, the U.S. Congress passed the Disaster Mitigation Act of 2000 (“Disaster Mitigation Act”) emphasizing the need for pre-disaster mitigation of potential hazards; and WHEREAS, the Disaster Mitigation Act made available hazard mitigation grants to state and local governments; and
WHEREAS, an adopted Local Hazard Mitigation Plan is required as a condition of future funding for mitigation projects under multiple FEMA pre- and post-disaster mitigation grant programs; and WHEREAS, the City of Cathedral City fully participated in the FEMA-prescribed mitigation planning process to prepare this local hazard mitigation plan; and WHEREAS, the California Office of Emergency Services and Federal Emergency Management Agency, Region IX officials have reviewed the City of Cathedral City Local Hazard Mitigation Plan and approve it contingent upon this official adoption of the participating governing body; and WHEREAS, the City of Cathedral City desires to comply with the requirements of the Disaster Mitigation Act and to augment its emergency planning efforts by formally adopting the City of Local Hazard Mitigation Plan Update
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Cathedral City Hazard Mitigation Plan by reference into the Safety Element of the General Plan in accordance with the requirements of AB 2140; and
WHEREAS, adoption by the governing body for the City of Cathedral City demonstrates the jurisdiction’s commitment to fulfilling the mitigation goals and objectives outlined in this Local Hazard Mitigation Plan; and
WHEREAS, adoption of this legitimizes the plan and authorizes responsible agencies to carry out their responsibilities under the plan.
NOW, THEREFORE, BE IT RESOLVED that the City of Cathedral City adopts the City of Cathedral City Local Hazard Mitigation Plan as an official plan; and BE IT RESOLVED, that the City of Cathedral City adopts the Cathedral City Local Hazard Mitigation Plan by reference into the safety element of their general plan in accordance with the requirements of AB 2140; and
BE IT FURTHER RESOLVED, the City of Cathedral City will submit this adoption resolution to the California Office of Emergency Services and FEMA Region IX officials to enable the plan’s final approval in accordance with the requirements of the Disaster Mitigation Act of 2000 and to establish conformance with the requirement of AB 2140.
Passed:
(date)
Certifying Official
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Appendix B: LHMP Approval Process
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Appendix C. Public Outreach Documentation
Public post on Discover Cathedral City, January 7, 2025
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Facebook post from Cathedral City, January 7, 2025
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Public noticed published in the Desert Sun, January 12, 2025
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Appendix D: Survey Results (English)
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Appendix E: Other Public Comment
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