ZIP code 92377

San Bernardino County, including Rialto

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Report created October 31, 2026 at www.firezones.org/zip/92377

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    1. Very High 12 acres · Local Responsibility Area <1%
    2. High 1,301 acres · 41 state, 1,260 local 28%
    3. Moderate 252 acres · Local Responsibility Area 5%
    4. Non-wildland 3,043 acres · Local Responsibility Area 66%

    4,608 acres of land in all, 41 in the State Responsibility Area and 4,567 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 12 fires that burned here

    1. 1979 Sierra Series Fire 1,838 acres in total 1,241 acres here
    2. 2003 Grand Prix Fire 50,618 acres in total · Cause: Arson 349 acres here
    3. 1959 Stonehurst Fire 341 acres in total 322 acres here
    4. 1967 Fpd #49 Fire 462 acres in total 274 acres here
    5. 1967 County Roads #15 Fire 453 acres in total 272 acres here
    6. 1925 Unnamed fire 1,185 acres in total 96 acres here
    7. 1973 Sycamore Fire 1,655 acres in total 49 acres here
    8. 1914 Unnamed fire 45 acres here
    9. 2010 Cactus Fire 40 acres in total · Cause: Power lines 38 acres here
    10. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 24 acres here

    And 2 smaller fires. The most recent was the 2010 Cactus Fire, which burned 38 acres here. In all, 1,961 acres of ZIP code 92377 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 92377

Neighboring ZIP codes

  1. 92377 28% High · <1% Very High · this area
  2. 92336 11% Very High
  3. 92358 7% Very High
  4. 92376 3% High
  5. 92407 28% Very High
  6. 92411 14% 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