Irvine

City in Orange County

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Report created October 27, 2026 at www.firezones.info/community/36770/irvine

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    25% Very High

    Most of the Very High land is in the Local Responsibility Area, where the City of Irvine adopts the zones CAL FIRE recommends.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    24% has burned

    Most recently the 2021 Ridge Fire, which burned 5 acres here, one of 19 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    18% 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 10,510 acres · 8 state, 10,502 local 25%
  2. High 4,266 acres · Local Responsibility Area 10%
  3. Moderate 1,392 acres · Local Responsibility Area 3%
  4. Non-wildland 26,023 acres · Local Responsibility Area 62%

42,191 acres of land in all, 8 in the State Responsibility Area and 42,183 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. 2007 Santiago Fire Of 28,430 acres in all · Cause: Miscellaneous 5,632 acres
  2. 1948 Green River Fire Of 53,080 acres in all 4,318 acres
  3. 2020 Silverado Fire Of 12,469 acres in all 4,263 acres
  4. 1993 Laguna Fire Of 14,338 acres in all · Cause: Arson 3,923 acres
  5. 1967 Paseo Grande Fire Of 51,077 acres in all 3,696 acres
  6. 1984 Loma Ridge Fire Of 1,435 acres in all 1,271 acres
  7. 1931 Unnamed fire Of 7,760 acres in all 472 acres
  8. 1914 Unnamed fire Of 18,755 acres in all 425 acres
  9. 1997 Baker Fire Of 6,320 acres in all 183 acres
  10. 2007 261 Incident Fire Of 90 acres in all · Cause: Vehicle 67 acres

And 9 smaller fires. In all, 9,981 acres of Irvine 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

ZIP codes in Irvine

Neighboring communities

  1. Irvine 25% Very High · this area
  2. Costa Mesa 2% High
  3. Laguna Hills 2% Very High
  4. Laguna Woods 22% Very High
  5. Lake Forest 33% Very High
  6. Newport Beach 28% Very High
  7. North Tustin 9% Very High
  8. Orange 22% Very High
  9. Santa Ana No hazard zones
  10. Tustin 6% Very High