ZIP code 91321

Los Angeles County, including Santa Clarita

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Report created October 27, 2026 at www.firezones.info/zip/91321

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    66% Very High

    Most of the Very High land is in the Local Responsibility Area, where each city or county adopts the zones CAL FIRE recommends.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    85% has burned

    Most recently the 2025 Hurst Fire, which burned 551 acres here, one of 94 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 11,307 acres · 4,277 state, 7,030 local 66%
  2. High 609 acres · Local Responsibility Area 4%
  3. Moderate 329 acres · Local Responsibility Area 2%
  4. Non-wildland 694 acres · Local Responsibility Area 4%
  5. Not mapped by CAL FIRE 4,130 acres · Mostly federal land 24%

17,068 acres of land in all, 4,277 in the State Responsibility Area and 8,662 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. 1962 Newhall Fire Of 8,583 acres in all 6,705 acres
  2. 2004 Foothill Fire Of 5,970 acres in all · Cause: Arson 4,568 acres
  3. 2008 Sayre Fire Of 11,260 acres in all 4,511 acres
  4. 1919 Ravenna Fire Of 70,796 acres in all 2,640 acres
  5. 1916 Tunnel Fire Of 3,441 acres in all 2,635 acres
  6. 2019 Saddle Ridge Fire Of 8,799 acres in all 2,377 acres
  7. 1970 Clampitt Fire Of 115,537 acres in all · Cause: Power lines 2,049 acres
  8. 2016 Sand Fire Of 41,383 acres in all · Cause: Equipment use 1,631 acres
  9. 1957 Unnamed fire 878 acres
  10. 1979 Placerita Fire 816 acres

And 84 smaller fires. In all, 14,576 acres of ZIP code 91321 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 91321

Neighboring ZIP codes

  1. 91321 66% Very High · this area
  2. 91311 78% Very High
  3. 91342 35% Very High
  4. 91344 36% Very High
  5. 91350 80% Very High
  6. 91351 61% Very High
  7. 91355 48% Very High
  8. 91381 92% Very High
  9. 91387 35% Very High