ZIP code 93063

Ventura County, including Simi Valley and Santa Susana

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Report created October 27, 2026 at www.firezones.info/zip/93063

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    82% Very High

    Most of the Very High land is in the State Responsibility Area, where the State Fire Marshal's zones apply.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    77% has burned

    Most recently the 2025 Cottonwood Fire, which burned 26 acres here, one of 46 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    100% 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 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 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. 2003 Simi Fire Of 107,570 acres in all 15,448 acres
  2. 1970 Clampitt Fire Of 115,537 acres in all · Cause: Power lines 14,797 acres
  3. 1981 Oat Fire Of 17,787 acres in all 4,404 acres
  4. 1988 Keuhner Fire Of 3,819 acres in all 2,513 acres
  5. 2005 Topanga Fire Of 23,396 acres in all 2,060 acres
  6. 1985 Hummingbird Fire Of 2,383 acres in all 1,849 acres
  7. 2008 Sesnon Fire Of 14,701 acres in all 1,661 acres
  8. 1943 Bellanger Ranch Fire 1,448 acres
  9. 1967 Devonshire-Parker Fire Of 23,094 acres in all 1,264 acres
  10. 1957 Santa Susana Pass Fire Of 4,734 acres in all 1,101 acres

And 36 smaller fires. 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

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 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