San Diego County

County in California

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Report created October 27, 2026 at www.firezones.info/county/073/san-diego

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    37% 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

    54% has burned

    Most recently the 2025 Border 18 Fire, which burned 60 acres here, one of 1,631 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    33% 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 1,012,486 acres · 855,169 state, 157,318 local 37%
  2. High 181,622 acres · 128,113 state, 53,509 local 7%
  3. Moderate 465,519 acres · 183,401 state, 282,118 local 17%
  4. Non-wildland 260,538 acres · Local Responsibility Area 10%
  5. Not mapped by CAL FIRE 804,808 acres · Mostly federal land 30%

2,724,973 acres of land in all, 1,166,682 in the State Responsibility Area and 753,483 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 Cedar Fire Cause: Equipment use 270,686 acres
  2. 1970 Laguna Fire Cause: Campfire 174,162 acres
  3. 2007 Witch Fire Cause: Miscellaneous 162,070 acres
  4. 2007 Harris 2 Fire 90,715 acres
  5. 1944 Unnamed fire Cause: Miscellaneous 64,417 acres
  6. 1928 Unnamed fire Cause: Miscellaneous 62,962 acres
  7. 1950 Conejos Fire Cause: Miscellaneous 62,847 acres
  8. 1913 Unnamed fire 62,426 acres
  9. 2002 Pines Fire Cause: Power lines 61,691 acres
  10. 2003 Paradise Fire Cause: Arson 56,546 acres

And 1,621 smaller fires. In all, 1,479,549 acres of San Diego 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 Diego County

Unincorporated communities in San Diego County

ZIP codes in San Diego County

116

Neighboring counties

  1. San Diego County 37% Very High · this area
  2. Imperial County 12% Moderate · <1% High
  3. Orange County 33% Very High
  4. Riverside County 15% Very High