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Board adopts state fire hazard severity zone maps for Napa County local responsibility areas

3205949 · May 7, 2025
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Summary

Napa County will adopt updated Local Responsibility Area (LRA) fire hazard severity zone maps produced by the California State Fire Marshal and apply existing state and local regulations (chapter 7A building standards, AB 38 disclosures, defensible space and fire‑safe road standards) to newly mapped areas.

The Napa County Board of Supervisors on May 6 voted unanimously to adopt updated fire hazard severity zone maps developed by the California Office of the State Fire Marshal for the county—s Local Responsibility Area (LRA). The maps are the first major statewide update since 2007 and require local adoption of three zone classes (moderate, high and very high). The state mandated adoption deadline requires local jurisdictions to adopt the maps within 120 days of release.

What the maps do: The State Fire Marshal—s updated maps use recent fire behavior science, vegetation and fuel‑load data, terrain and local weather patterns, and ember‑exposure modeling to identify areas likely to experience…

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