ZIP code 93063

Ventura County, including Simi Valley and Santa Susana

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Report created October 31, 2026 at www.firezones.org/zip/93063

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    1. Very High 19,167 acres · 15,818 state, 3,349 local 82%
    2. High 615 acres · Local Responsibility Area 3%
    3. Moderate 546 acres · Local Responsibility Area 2%
    4. Non-wildland 2,916 acres · Local Responsibility Area 13%

    23,243 acres of land in all, 15,818 in the State Responsibility Area and 7,425 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 46 fires that burned here

    1. 2003 Simi Fire 107,570 acres in total 15,448 acres here
    2. 1970 Clampitt Fire 115,537 acres in total · Cause: Power lines 14,797 acres here
    3. 1981 Oat Fire 17,787 acres in total 4,404 acres here
    4. 1988 Keuhner Fire 3,819 acres in total 2,513 acres here
    5. 2005 Topanga Fire 23,396 acres in total 2,060 acres here
    6. 1985 Hummingbird Fire 2,383 acres in total 1,849 acres here
    7. 2008 Sesnon Fire 14,701 acres in total 1,661 acres here
    8. 1943 Bellanger Ranch Fire 1,448 acres here
    9. 1967 Devonshire-Parker Fire 23,094 acres in total 1,264 acres here
    10. 1957 Santa Susana Pass Fire 4,734 acres in total 1,101 acres here

    And 36 smaller fires. The most recent was the 2025 Cottonwood Fire, which burned 26 acres here. In all, 18,009 acres of ZIP code 93063 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 93063

Neighboring ZIP codes

  1. 93063 82% Very High · this area
  2. 91304 51% Very High
  3. 91311 78% Very High
  4. 91381 92% Very High
  5. 93064 92% Very High
  6. 93065 72% 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