ZIP code 91963

San Diego County, including Potrero

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Report created October 31, 2026 at www.firezones.org/zip/91963

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE 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 April 1, 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

  • Fire history

    The 10 largest of 54 fires that burned here

    1. 1970 Laguna Fire 174,162 acres in total · Cause: Campfire 8,719 acres here
    2. 2007 Harris 2 Fire 90,728 acres in total 7,965 acres here
    3. 1943 Unnamed fire 13,707 acres in total · Cause: Miscellaneous 5,962 acres here
    4. 1953 Bronco Flats Fire 8,817 acres in total · Cause: Miscellaneous 4,002 acres here
    5. 2006 Horse Fire 16,678 acres in total · Cause: Campfire 3,461 acres here
    6. 2016 Border 3 Fire 7,606 acres in total 2,940 acres here
    7. 1925 Unnamed fire 4,105 acres in total · Cause: Miscellaneous 2,243 acres here
    8. 1948 Unnamed fire 7,884 acres in total · Cause: Miscellaneous 2,235 acres here
    9. 1912 Unnamed fire 2,554 acres in total 2,058 acres here
    10. 1942 Unnamed fire 2,934 acres in total 2,030 acres here

    And 44 smaller fires. The most recent was the 2024 Vida Fire, which burned 2 acres here. 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

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

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published June 27, 2025, local map February 2, 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published July 28, 2026

This site is independent and not affiliated with CAL FIRE, so for an official determination, check with the agency or your city or county. How we read the data