Draft 2025 Water Shortage Contingency Plan

Orange County Water & Wastewater Multi-Jurisdictional Hazard Mitigation Plan 2024

O.6 VULNERABILITY AND RISK ASSESSMENT Assessing vulnerabilities shows the unique characteristics of individual hazards and begins the process of narrowing down locations within IRWD’s service area that are vulnerable to specific hazard events. The existing vulnerability assessment in the 2021 LHMP considered unique local knowledge of hazards and impacts and a Geographic Information Systems (GIS) overlaying method for examining such vulnerabilities more in depth. Using these methods, vulnerable populations, infrastructure, and potential losses from hazards were estimated. This coupled with the analysis conducted in this MJHMP update ensures the IRWD Annex meets the latest requirements adopted by FEMA. Exhibit O-10 identifies the risks assessment conducted on IRWD critical facilities from the previous LHMP, which was determined to be relevant for this update. No new assets have been constructed since that analysis. To supplement this, the updated hazard profiles and vulnerability discussions in Section 3 address the latest FEMA requirements since IRWD’s last update.

O-13

WSCP - 66

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