NEW 2025 Fire Hazard Severity Zone (FHSZ) Maps On February 24, 2025, CAL FIRE has released the updated 2025 Fire Hazard Severity Zone (FHSZ) maps for the City of Petaluma, identifying areas with moderate, high, and very high wildfire risk within Local Responsibility Areas (LRA): 2025 FHSZ Map: Petaluma 2025 Fire Hazard Severity Zone Viewer...