Dynamic Planning + Science partnered with Napa County, its incorporated communities, and participating special districts and local agencies to prepare the 2026 Multi-Jurisdictional Hazard Mitigation Plan update. The plan provides a coordinated, countywide framework for reducing risks to people, property, infrastructure, essential services, and natural resources from nine priority hazards.
The update combines new GIS data, detailed vulnerability assessments, public and stakeholder engagement, and jurisdiction-specific planning to identify practical mitigation priorities. Interactive tools, including the Risk Assessment Mapping Platform and Mitigation Action Support Tool, helped planning partners evaluate exposure, document local concerns, and develop actions tailored to their responsibilities and capabilities. The plan also supports continued eligibility for state and FEMA hazard mitigation funding.
- Coordinated Napa County, five cities, the Town of Yountville, and participating special districts and agencies through a unified planning process
- Evaluated wildfire, flood, dam failure, earthquake, slope failure, drought, severe weather, extreme heat, and climate change
- Used GIS analysis to measure hazard exposure among populations, parcels, property values, critical facilities, and lifeline infrastructure
- Developed the Risk Assessment Mapping Platform and Mitigation Action Support Tool to support analysis, collaboration, and implementation
- Prepared localized vulnerability assessments, problem statements, capabilities reviews, and mitigation actions for each participating jurisdiction
- Developed 136 actions addressing public education, prevention, structural protection, emergency services, and natural resource protection
- Considered future climate conditions and disproportionate impacts on vulnerable populations throughout the risk assessment and mitigation process
- Established a framework for prioritizing projects, coordinating regional partnerships, tracking progress, and pursuing state and federal mitigation funding
