San Bernardino County

County in California

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Report created October 27, 2026 at www.firezones.info/county/071/san-bernardino

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    13% Moderate · 2% Very High

    Most of the Moderate land is in the Local Responsibility Area, where each city or county adopts the zones CAL FIRE recommends.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    7% has burned

    Most recently the 2025 Black Rock Fire, which burned 66 acres here, one of 1,048 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    4% Elevated · 3% Extreme

    Utilities may shut off power in the CPUC High Fire-Threat District in fire weather, and homes outside it can lose power when their lines run through it.

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Land by hazard class

  1. Very High 263,521 acres · 146,088 state, 117,433 local 2%
  2. High 232,390 acres · 82,218 state, 150,172 local 2%
  3. Moderate 1,612,032 acres · 116,226 state, 1,495,806 local 13%
  4. Non-wildland 330,220 acres · Local Responsibility Area 3%
  5. Not mapped by CAL FIRE 10,429,303 acres · Mostly federal land 81%

12,867,467 acres of land in all, 344,532 in the State Responsibility Area and 2,093,631 in the Local. State zones are the ones the State Fire Marshal designated, in effect since 1 April 2024. Local zones are CAL FIRE's 2025 recommendation, which each city or county adopts by ordinance and can make stricter. How to read fire zones

Largest fires

  1. 2003 Old Fire Cause: Arson 91,400 acres
  2. 2023 York Fire Of 93,078 acres in all 84,494 acres
  3. 2005 Wildhorse Fire Cause: Lightning 63,764 acres
  4. 1999 Willow Fire Cause: Campfire 63,355 acres
  5. 2006 Sawtooth Complex Cause: Lightning 61,763 acres
  6. 1970 Bear Fire Cause: Campfire 51,651 acres
  7. 2003 Grand Prix Fire Cause: Arson 50,614 acres
  8. 2020 Dome Fire Cause: Lightning 44,209 acres
  9. 2024 Line Fire 43,971 acres
  10. 1970 Unnamed fire Of 37,472 acres in all · Cause: Miscellaneous 36,594 acres

And 1,038 smaller fires. In all, 918,230 acres of San Bernardino County have burned. Acres are the land each fire burned here, and fires that crossed less than an acre are not counted. Some older or smaller fires may be missing, and a fire perimeter can include unburned patches. How to read fire history

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published 27 June 2025, local map 2 February 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Power line fire risk
California Public Utilities Commission
Published 23 February 2026

This site is independent and not affiliated with CAL FIRE or the CPUC, so for an official determination, check with the agency or your city or county. How we read the data

Nearby areas

Cities and towns in San Bernardino County

Unincorporated communities in San Bernardino County

ZIP codes in San Bernardino County

97

Neighboring counties

  1. San Bernardino County 13% Moderate · 2% Very High · this area
  2. Inyo County 4% Moderate · <1% Very High
  3. Kern County 12% Very High
  4. Los Angeles County 29% Very High
  5. Orange County 33% Very High
  6. Riverside County 15% Very High