ZIP code 91381

Los Angeles County, including Stevenson Ranch

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Report created October 27, 2026 at www.firezones.info/zip/91381

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    92% 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

    93% has burned

    Most recently the 2021 Towsley Fire, which burned 183 acres here, one of 52 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 23,313 acres · 21,690 state, 1,623 local 92%
  2. High 497 acres · 194 state, 303 local 2%
  3. Moderate 574 acres · 364 state, 210 local 2%
  4. Non-wildland 280 acres · Local Responsibility Area 1%
  5. Not mapped by CAL FIRE 643 acres · Mostly federal land 3%

25,307 acres of land in all, 22,248 in the State Responsibility Area and 2,416 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. 1970 Clampitt Fire Of 115,537 acres in all · Cause: Power lines 15,253 acres
  2. 2003 Simi Fire Of 107,570 acres in all 14,166 acres
  3. 1940 Townley Cyn-Pico Cyn Fire Of 6,532 acres in all 6,287 acres
  4. 1962 Golden Fire Of 9,233 acres in all 5,624 acres
  5. 2017 Rye Fire Of 6,048 acres in all 3,881 acres
  6. 2007 Magic Fire 2,820 acres
  7. 1957 Unnamed fire 1,730 acres
  8. 1979 Valencia Fire 1,215 acres
  9. 2019 Saddle Ridge Fire Of 8,799 acres in all 1,168 acres
  10. 2016 Sage Fire Cause: Campfire 851 acres

And 42 smaller fires. In all, 23,413 acres of ZIP code 91381 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 91381

Neighboring ZIP codes

  1. 91381 92% Very High · this area
  2. 91311 78% Very High
  3. 91321 66% Very High
  4. 91342 35% Very High
  5. 91344 36% Very High
  6. 91355 48% Very High
  7. 91384 60% Very High
  8. 93063 82% Very High