San Antonio Heights

Community in San Bernardino County

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Report created October 27, 2026 at www.firezones.info/community/64462/san-antonio-heights

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    59% 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

    65% has burned

    Most recently the 2008 San Antonio Fire, which burned 54 acres here, one of 17 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    37% 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 988 acres · 619 state, 369 local 59%
  2. High 182 acres · Local Responsibility Area 11%
  3. Moderate 117 acres · Local Responsibility Area 7%
  4. Non-wildland 156 acres · Local Responsibility Area 9%
  5. Not mapped by CAL FIRE 224 acres · Mostly federal land 13%

1,669 acres of land in all, 619 in the State Responsibility Area and 825 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 Grand Prix Fire Of 50,618 acres in all · Cause: Arson 767 acres
  2. 1970 Unnamed fire Of 37,472 acres in all · Cause: Miscellaneous 629 acres
  3. 1935 San Antonio Canyon Fire Of 586 acres in all 258 acres
  4. 2003 Padua Fire Of 10,458 acres in all · Cause: Arson 244 acres
  5. 1960 Armstrong Fire Of 807 acres in all 242 acres
  6. 1911 Unnamed fire Of 349 acres in all 206 acres
  7. 1958 Dam Fire 147 acres
  8. 1914 Unnamed fire Of 293 acres in all 133 acres
  9. 1988 Unnamed fire Of 143 acres in all · Cause: Arson 128 acres
  10. 1910 Unnamed fire Of 1,646 acres in all 90 acres

And 7 smaller fires. In all, 1,077 acres of San Antonio Heights 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

ZIP codes in San Antonio Heights

Neighboring communities

  1. San Antonio Heights 59% Very High · this area
  2. Claremont 37% Very High
  3. Rancho Cucamonga 30% Very High
  4. Upland 5% High · 5% Very High