Rancho Cucamonga

City in San Bernardino County

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Report created October 27, 2026 at www.firezones.info/community/59451/rancho-cucamonga

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    30% Very High

    Most of the Very High land is in the Local Responsibility Area, where the City of Rancho Cucamonga adopts the zones CAL FIRE recommends.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    36% has burned

    Most recently the 2014 Etiwanda Fire, which burned 1,694 acres here, one of 39 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    9% 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 8,874 acres · 2 state, 8,872 local 30%
  2. High 1,123 acres · Local Responsibility Area 4%
  3. Moderate 916 acres · Local Responsibility Area 3%
  4. Non-wildland 18,792 acres · Local Responsibility Area 63%
  5. Not mapped by CAL FIRE 75 acres · Mostly federal land <1%

29,780 acres of land in all, 2 in the State Responsibility Area and 29,703 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 Unnamed fire Of 37,472 acres in all · Cause: Miscellaneous 7,956 acres
  2. 2003 Grand Prix Fire Of 50,618 acres in all · Cause: Arson 6,674 acres
  3. 1988 Texas Fire Of 12,096 acres in all · Cause: Arson 3,625 acres
  4. 1988 Unnamed fire Of 4,358 acres in all 3,108 acres
  5. 1980 Summit Fire Of 4,368 acres in all 1,769 acres
  6. 2014 Etiwanda Fire Of 2,142 acres in all · Cause: Miscellaneous 1,694 acres
  7. 1921 Unnamed fire Of 1,055 acres in all 868 acres
  8. 1988 Unnamed fire Of 5,244 acres in all 648 acres
  9. 1952 East Fire 545 acres
  10. 1970 Fpd #92 (Al) Fire 499 acres

And 29 smaller fires. In all, 10,609 acres of Rancho Cucamonga 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 Rancho Cucamonga

Neighboring communities

  1. Rancho Cucamonga 30% Very High · this area
  2. Fontana 15% Very High
  3. Ontario No hazard zones
  4. San Antonio Heights 59% Very High
  5. Upland 5% High · 5% Very High