ZIP code 91931

San Diego County

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Report created October 27, 2026 at www.firezones.info/zip/91931

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    27% Very High

    All 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

    64% has burned

    Most recently the 2003 Cedar Fire, which burned 135 acres here, one of 8 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    100% 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 1,443 acres · State Responsibility Area 27%
  2. Not mapped by CAL FIRE 3,808 acres · Mostly federal land 73%

5,251 acres of land in all, 1,443 of it in the State Responsibility Area. 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

Fires that burned here

  1. 1970 Laguna Fire Of 174,162 acres in all · Cause: Campfire 2,485 acres
  2. 1928 Unnamed fire Of 5,693 acres in all · Cause: Miscellaneous 436 acres
  3. 1931 Unnamed fire Of 179 acres in all · Cause: Miscellaneous 177 acres
  4. 1941 Unnamed fire Cause: Miscellaneous 152 acres
  5. 2003 Cedar Fire Of 270,686 acres in all · Cause: Equipment use 135 acres
  6. 1970 Guatay Fire Of 70 acres in all · Cause: Playing with fire 68 acres
  7. 1950 Conejos Fire Of 62,849 acres in all · Cause: Miscellaneous 48 acres
  8. 1945 Unnamed fire Of 181 acres in all · Cause: Miscellaneous 5 acres

In all, 3,377 acres of ZIP code 91931 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

Neighboring ZIP codes

  1. 91931 27% Very High · this area
  2. 91901 53% Very High
  3. 91916 49% Very High
  4. 91962 25% Very High