Orange County

County in California

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Report created October 27, 2026 at www.firezones.info/county/059/orange

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    33% Very High

    Most of the Very High land is in the State Responsibility Area, where the State Fire Marshal's zones apply.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    38% has burned

    Most recently the 2025 Club Fire, which burned 4 acres here, one of 199 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    26% 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 166,951 acres · 101,983 state, 64,968 local 33%
  2. High 24,262 acres · 3,198 state, 21,065 local 5%
  3. Moderate 11,026 acres · 982 state, 10,044 local 2%
  4. Non-wildland 245,314 acres · Local Responsibility Area 48%
  5. Not mapped by CAL FIRE 63,434 acres · Mostly federal land 12%

510,987 acres of land in all, 106,162 in the State Responsibility Area and 341,391 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. 1948 Green River Fire Of 53,080 acres in all 52,461 acres
  2. 1967 Paseo Grande Fire Of 51,077 acres in all 45,910 acres
  3. 1958 Steward Fire Of 68,106 acres in all 39,383 acres
  4. 2007 Santiago Fire Cause: Miscellaneous 28,426 acres
  5. 1980 Indian Fire Of 28,940 acres in all · Cause: Miscellaneous 25,078 acres
  6. 2024 Airport Fire Of 23,526 acres in all · Cause: Equipment use 21,281 acres
  7. 1982 Gypsum Fire Cause: Miscellaneous 20,142 acres
  8. 1914 Unnamed fire 18,754 acres
  9. 1993 Ortega Fire Of 21,012 acres in all · Cause: Miscellaneous 16,115 acres
  10. 2008 Freeway Fire Of 30,305 acres in all · Cause: Vehicle 15,547 acres

And 189 smaller fires. In all, 193,971 acres of Orange 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 Orange County

Unincorporated communities in Orange County

ZIP codes in Orange County

90

Neighboring counties

  1. Orange County 33% Very High · this area
  2. Los Angeles County 29% Very High
  3. Riverside County 15% Very High
  4. San Bernardino County 13% Moderate · 2% Very High
  5. San Diego County 37% Very High