ZIP code 91963

San Diego County, including Potrero

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Report created October 27, 2026 at www.firezones.info/zip/91963

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    51% 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

    85% has burned

    Most recently the 2024 Vida Fire, which burned 2 acres here, one of 54 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 13,520 acres · 13,513 state, 7 local 51%
  2. High 1,145 acres · State Responsibility Area 4%
  3. Not mapped by CAL FIRE 11,735 acres · Mostly federal land 44%

26,399 acres of land in all, 14,657 in the State Responsibility Area and 7 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. 1970 Laguna Fire Of 174,162 acres in all · Cause: Campfire 8,719 acres
  2. 2007 Harris 2 Fire Of 90,728 acres in all 7,965 acres
  3. 1943 Unnamed fire Of 13,707 acres in all · Cause: Miscellaneous 5,962 acres
  4. 1953 Bronco Flats Fire Of 8,817 acres in all · Cause: Miscellaneous 4,002 acres
  5. 2006 Horse Fire Of 16,678 acres in all · Cause: Campfire 3,461 acres
  6. 2016 Border 3 Fire Of 7,606 acres in all 2,940 acres
  7. 1925 Unnamed fire Of 4,105 acres in all · Cause: Miscellaneous 2,243 acres
  8. 1948 Unnamed fire Of 7,884 acres in all · Cause: Miscellaneous 2,235 acres
  9. 1912 Unnamed fire Of 2,554 acres in all 2,058 acres
  10. 1942 Unnamed fire Of 2,934 acres in all 2,030 acres

And 44 smaller fires. In all, 22,456 acres of ZIP code 91963 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

Communities in ZIP code 91963

Neighboring ZIP codes

  1. 91963 51% Very High · this area
  2. 91906 38% Very High
  3. 91917 51% Very High
  4. 91962 25% Very High
  5. 91980 86% Very High