ZIP code 91701

San Bernardino County, including Rancho Cucamonga

Search for an address

Report created October 27, 2026 at www.firezones.info/zip/91701

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    15% Very High

    Most of the Very High land is in the Local Responsibility Area, where each city or county adopts the zones CAL FIRE recommends.

    Open map

  • Fire history

    Share of the land inside a recorded wildfire perimeter

    20% has burned

    Most recently the 2003 Grand Prix Fire, which burned 286 acres here, one of 10 fires on record.

    Open map

  • Power line fire risk

    Share of the land in the High Fire-Threat District

    8% Elevated · <1% 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.

    Open map

Land by hazard class

  1. Very High 721 acres · <1 state, 721 local 15%
  2. High 186 acres · Local Responsibility Area 4%
  3. Moderate 147 acres · Local Responsibility Area 3%
  4. Non-wildland 3,684 acres · Local Responsibility Area 78%

4,737 acres of land in all, <1 in the State Responsibility Area and 4,737 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

Fires that burned here

  1. 1970 Unnamed fire Of 37,472 acres in all · Cause: Miscellaneous 296 acres
  2. 2003 Grand Prix Fire Of 50,618 acres in all · Cause: Arson 286 acres
  3. 1945 Unnamed fire Of 418 acres in all 185 acres
  4. 1970 Fpd #92 (Al) Fire Of 500 acres in all 129 acres
  5. 1944 Unnamed fire Of 171 acres in all 77 acres
  6. 1923 Unnamed fire 58 acres
  7. 1923 Lewis Canyon Fire Of 48 acres in all 42 acres
  8. 1911 Unnamed fire 40 acres
  9. 1976 Unnamed fire Of 88 acres in all 37 acres
  10. 1994 Unnamed fire Of 127 acres in all · Cause: Miscellaneous 3 acres

In all, 960 acres of ZIP code 91701 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 91701

Neighboring ZIP codes

  1. 91701 15% Very High · this area
  2. 91730 No hazard zones
  3. 91737 57% Very High
  4. 91739 36% Very High
  5. 91784 25% Very High
  6. 91786 2% High
  7. 92358 7% Very High