ZIP code 91709

San Bernardino County, including Chino Hills

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Report created October 31, 2026 at www.firezones.org/zip/91709

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE 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 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 19 fires that burned here

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

    And 9 smaller fires. The most recent was the 2020 Blue Ridge Fire, which burned 10,523 acres here. 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

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

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