ZIP code 91917

San Diego County

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Report created October 27, 2026 at www.firezones.info/zip/91917

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    51% 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

    >99% has burned

    Most recently the 2025 Border 18 Fire, which burned 60 acres here, one of 103 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 17,010 acres · State Responsibility Area 51%
  2. Not mapped by CAL FIRE 16,201 acres · Mostly federal land 49%

33,212 acres of land in all, 17,010 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

Largest fires

  1. 2007 Harris 2 Fire Of 90,728 acres in all 26,558 acres
  2. 1995 Sycamore Fire Of 9,433 acres in all 8,780 acres
  3. 2003 Mine/Otay Fire Of 44,734 acres in all · Cause: Miscellaneous 6,983 acres
  4. 1948 Unnamed fire Of 7,884 acres in all · Cause: Miscellaneous 4,450 acres
  5. 1953 Bronco Flats Fire Of 8,817 acres in all · Cause: Miscellaneous 3,492 acres
  6. 1979 Unnamed fire Of 6,151 acres in all 3,300 acres
  7. 1970 Laguna Fire Of 174,162 acres in all · Cause: Campfire 2,971 acres
  8. 2022 Border 32 Fire Of 4,456 acres in all 2,876 acres
  9. 2005 Border#50 Fire Of 3,863 acres in all · Cause: Miscellaneous 2,695 acres
  10. 2006 Horse Fire Of 16,678 acres in all · Cause: Campfire 2,615 acres

And 93 smaller fires. In all, 33,168 acres of ZIP code 91917 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. 91917 51% Very High · this area
  2. 91935 82% Very High
  3. 91963 51% Very High
  4. 91980 86% Very High
  5. 92154 40% Very High