California Fire Hazard Severity Zones (FHSZ) by county

What California's Fire Hazard Severity Zones actually measure, why a hazard zone is not an insurer's decision, and how to look up wildfire hazard for any of the 58 counties.

InsuranceMonster mascot shielding a home from wildfire
California's Fire Hazard Severity Zone (FHSZ) maps, maintained by CAL FIRE, classify land as Moderate, High, or Very High wildfire hazard for planning, building, and mitigation. A zone measures physical hazard, not an insurer's underwriting decision, and does not by itself set a home's price or availability. The table below summarizes CAL FIRE wildfire hazard for all 58 California counties - select a county for its full profile and coverage options.

Hazard is not the same as your insurance risk

A Fire Hazard Severity Zone measures long-term physical wildfire hazard - vegetation, terrain, weather, and fire history - to guide land-use planning, building codes, and defensible-space rules. It is not an insurer's property-level underwriting score or catastrophe model. The California Department of Insurance has stated that CAL FIRE's maps do not by themselves determine insurance rates or availability, so a zone designation is one input among many, not the decision.

When carriers price a home and decide whether to write it, they may evaluate factors such as:

  • Roof type and age, and overall construction
  • Surrounding vegetation and defensible space
  • Slope, terrain, and road access
  • Distance from a fire station and available water supply
  • Replacement cost and the home's loss history
  • Their own proprietary wildfire catastrophe models

Look up any address on the official CAL FIRE Fire Hazard Severity Zone Viewer.

Look up wildfire hazard by county

Use the table below as a reference for how CAL FIRE classifies overall wildfire hazard across California's 58 counties. Remember that this is a planning-level hazard summary, not an insurer's decision or a parcel-level score - select any county for its full profile and coverage options.

CAL FIRE wildfire hazard by California county (highest hazard first)
CountyRegionWildfire hazard (CAL FIRE)
Alpine County Sierra Nevada High
Amador County Gold Country High
Butte County Sacramento Valley High
Calaveras County Gold Country High
El Dorado County Sierra Nevada High
Lake County North Coast High
Lassen County Far North High
Los Angeles County Southern California High
Madera County Central Valley High
Marin County Bay Area High
Mariposa County Sierra Nevada High
Mendocino County North Coast High
Modoc County Far North High
Mono County Eastern Sierra High
Monterey County Central Coast High
Napa County Bay Area High
Nevada County Sierra Nevada High
Placer County Sierra Nevada High
Plumas County Sierra Nevada High
Riverside County Inland Empire High
San Bernardino County Inland Empire High
San Diego County Southern California High
San Luis Obispo County Central Coast High
Santa Barbara County Central Coast High
Santa Cruz County Central Coast High
Shasta County Far North High
Sierra County Sierra Nevada High
Siskiyou County Far North High
Sonoma County Bay Area High
Tehama County Sacramento Valley High
Trinity County Far North High
Tulare County Central Valley High
Tuolumne County Sierra Nevada High
Ventura County Southern California High
Alameda County Bay Area Moderate
Colusa County Sacramento Valley Moderate
Contra Costa County Bay Area Moderate
Del Norte County North Coast Moderate
Fresno County Central Valley Moderate
Glenn County Sacramento Valley Moderate
Humboldt County North Coast Moderate
Inyo County Eastern Sierra Moderate
Kern County Central Valley Moderate
Orange County Southern California Moderate
San Benito County Central Coast Moderate
San Mateo County Bay Area Moderate
Santa Clara County Bay Area Moderate
Solano County Bay Area Moderate
Yuba County Sacramento Valley Moderate
Imperial County Southern California Low
Kings County Central Valley Low
Merced County Central Valley Low
Sacramento County Sacramento Valley Low
San Francisco County Bay Area Low
San Joaquin County Central Valley Low
Stanislaus County Central Valley Low
Sutter County Sacramento Valley Low
Yolo County Sacramento Valley Low

Hazard levels are a qualitative county-level summary derived from CAL FIRE data, not parcel-level scores. Check a specific address on the CAL FIRE viewer linked below.

Wildfire exposure makes some California homes hard to place in the standard market. As an independent broker we shop admitted carriers across all 58 counties, and where the market is limited we access surplus lines markets and the California FAIR Plan paired with a difference-in-conditions wrap.

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Answers

California FHSZ FAQ

What is a Fire Hazard Severity Zone (FHSZ) in California?

A Fire Hazard Severity Zone is a CAL FIRE classification of wildfire hazard - Moderate, High, or Very High - based on vegetation, terrain, weather, and fire history. The zones drive building codes and defensible-space rules. They measure physical hazard and are not an insurer's underwriting score.

Do Fire Hazard Severity Zones set home insurance rates?

No. The California Department of Insurance has stated that CAL FIRE's maps do not by themselves determine insurance rates or availability. A zone is one input; insurers price each property on its own characteristics, such as roof and construction, defensible space, access, replacement cost, loss history, and their own catastrophe models. Wildfire-exposed homes may still need surplus lines carriers or the California FAIR Plan.

Which California counties have the highest wildfire hazard?

Counties such as Napa, Sonoma, Lake, Butte, El Dorado, Nevada, Shasta, and Plumas carry high CAL FIRE wildfire hazard. Select any county above for its full Fire Hazard Severity Zone profile and coverage options.

What is the California FAIR Plan?

The California FAIR Plan is the state's insurer of last resort for fire coverage when the standard market declines. It is available statewide and is commonly paired with a difference-in-conditions wrap for theft, liability, and water damage it does not cover.

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