Orange County Water & Wastewater Multi-Jurisdictional Hazard Mitigation Plan 2024
repairs to these structures or may be renting and have little control of the recovery process if impacts occur. The entire population within the IRWD service area is susceptible to potential outages, however increased vulnerabilities exist for residents and facilities reliant on electricity-dependent medical equipment such as ventilators and monitoring equipment. The majority of the IRWD service area experiences coastal storms that have the potential to cause flooding and wind damage. Vulnerable populations associated with these events are similar to those experienced under those types of incidents. Residents and property owners located adjacent or in close proximity to streams and drainages have a higher vulnerability to flooding. Populations living in these drainages (unhoused), those without access to transportation or limited options, individuals with limited mobility, and populations with language limitations may experience greater impacts. Populations located in close proximity to properties storing, manufacturing, or disposing of hazardous materials are vulnerable to potential exposure if a release were to occur. In addition, properties along roadways used to transport these materials are also potentially vulnerable. Populations in these locations that experience mobility challenges (unable to evacuate/relocate) are especially vulnerable to these types of incidents.
Human-Caused Hazards: Power Outage
Coastal Hazards: Coastal Storm
Flood
Human-Caused Hazards: Hazardous Materials
Changes in Land Use and Development According to the 6 th cycle Housing Elements for the respective cities and county located within the IRWD service area anticipate a significant amount of new development and growth over the next 8 years. A majority of this development is anticipated to occur in the City of Irvine withing the Great Park development. This development is occurring on land formerly used as a military installation and it is anticipated that the new buildings and infrastructure constructed will be more resilient and meet the latest standards and federal, state, and local requirements. With new developments adhering to the latest standards and requirements, the vulnerability to any hazard has not changed for IRWD assets and populations. For the portions of the service areas previously developed, reinvestment and retrofitting is occurring in some areas which can reduce future vulnerability, however many areas still require mitigation activities, which may provide future opportunities for residents and businesses. Vulnerabilities Associated with Climate Change Hazard Climate Change Vulnerabilities
Hazards of High Concern Human-Caused Hazards: Terrorism (Cyber Threat) Hazards of Medium Concern Wildfire
Connections between climate change and cyber based terrorism have not been identified.
Climate change is expected to cause an increase in both wildfire severity and intensity. It is anticipated that the fire prone areas in both the eastern and western portions of the service area will experience more frequent and intense wildfires as a result of climate change. Climate change is not expected to cause any changes to the frequency or intensity of seismic shaking occurring within IRWD’s service area.
Seismic Hazards: Seismic Shaking
O-17
WSCP - 70
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