ZIP code 91709

San Bernardino County, including Chino Hills

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Report created October 27, 2026 at www.firezones.info/zip/91709

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    73% 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.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    65% has burned

    Most recently the 2020 Blue Ridge Fire, which burned 10,523 acres here, one of 19 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    56% 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 20,940 acres · 20 state, 20,920 local 73%
  2. High 2,946 acres · Local Responsibility Area 10%
  3. Moderate 759 acres · Local Responsibility Area 3%
  4. Non-wildland 4,047 acres · Local Responsibility Area 14%
  5. Not mapped by CAL FIRE 101 acres · Mostly federal land <1%

28,793 acres of land in all, 20 in the State Responsibility Area and 28,673 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. 2008 Freeway Fire Of 30,305 acres in all · Cause: Vehicle 12,210 acres
  2. 1980 Owl Fire Of 18,332 acres in all 10,710 acres
  3. 2020 Blue Ridge Fire Of 13,695 acres in all 10,523 acres
  4. 1990 Yorba Fire Of 7,884 acres in all 5,826 acres
  5. 1990 Carbon Canyon Fire Of 4,978 acres in all 1,982 acres
  6. 1947 Arnold No. 106 Fire Of 1,907 acres in all 1,795 acres
  7. 1988 State Park Fire Cause: Miscellaneous 820 acres
  8. 2002 Evening Fire Of 893 acres in all · Cause: Playing with fire 590 acres
  9. 1983 Hills Fire Cause: Equipment use 581 acres
  10. 1978 Soquel Fire Of 3,934 acres in all 550 acres

And 9 smaller fires. In all, 18,638 acres of ZIP code 91709 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 91709

Neighboring ZIP codes

  1. 91709 73% Very High · this area
  2. 91708 7% Very High
  3. 91710 No hazard zones
  4. 91765 55% Very High
  5. 91766 15% High
  6. 92821 57% Very High
  7. 92823 92% Very High
  8. 92880 29% Very High
  9. 92886 29% Very High
  10. 92887 65% Very High