ZIP code 95391

Alameda and San Joaquin counties, including Mountain House

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Report created October 31, 2026 at www.firezones.org/zip/95391

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    1. High 10,762 acres · 10,541 state, 221 local 61%
    2. Moderate 1,087 acres · 326 state, 760 local 6%
    3. Non-wildland 5,401 acres · Local Responsibility Area 31%
    4. Not mapped by CAL FIRE 257 acres · Mostly federal land 1%

    17,506 acres of land in all, 10,868 in the State Responsibility Area and 6,382 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 21 fires that burned here

    1. 1959 Marciel Fire 1,295 acres here
    2. 1970 Wprr #9 Fire 1,533 acres in total 1,126 acres here
    3. 1992 Flowind Fire 812 acres in total · Cause: Equipment use 696 acres here
    4. 1951 Dry Creek Fire 1,078 acres in total 694 acres here
    5. 2005 Bruns Fire 444 acres here
    6. 2010 Diablo Fire 459 acres in total 338 acres here
    7. 1988 Altamont #1 - 6 Fire 384 acres in total · Cause: Equipment use 237 acres here
    8. 2018 Grant Fire 632 acres in total · Cause: Miscellaneous 216 acres here
    9. 2005 Byron Fire 203 acres in total 174 acres here
    10. 1962 W.p.r.r. Co. #1 Fire 165 acres in total 142 acres here

    And 11 smaller fires. The most recent was the 2024 Flynn Fire, which burned 73 acres here. In all, 4,512 acres of ZIP code 95391 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 95391

Neighboring ZIP codes

  1. 95391 61% High · this area
  2. 94505 2% Moderate
  3. 94514 60% High
  4. 94550 74% Very High
  5. 94551 10% Very High
  6. 95206 No hazard zones
  7. 95304 22% Very High
  8. 95377 15% 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