ZIP code 91011

Los Angeles County, including La Cañada Flintridge and Pasadena

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Report created October 27, 2026 at www.firezones.info/zip/91011

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    81% 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 2009 Station Fire, which burned 2,425 acres here, one of 25 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    45% 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 5,865 acres · 307 state, 5,558 local 81%
  2. Moderate 126 acres · Local Responsibility Area 2%
  3. Not mapped by CAL FIRE 1,229 acres · Mostly federal land 17%

7,220 acres of land in all, 307 in the State Responsibility Area and 5,684 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. 1878 Unnamed fire Of 59,469 acres in all 5,141 acres
  2. 2009 Station Fire Of 160,833 acres in all · Cause: Arson 2,425 acres
  3. 1933 Montrose/La Cresc Fire Of 5,095 acres in all 2,200 acres
  4. 1975 Mill/Usfs Fire Of 51,220 acres in all 948 acres
  5. 1959 Woodwardia Fire Of 14,403 acres in all 747 acres
  6. 1935 Las Flores No. 57 Fire Of 2,521 acres in all 629 acres
  7. 1900 Big Fire Of 2,521 acres in all 629 acres
  8. 1984 Crest Fire Of 606 acres in all 352 acres
  9. 1965 Unnamed fire Of 382 acres in all 315 acres
  10. 1956 Dunsmore Fire Of 795 acres in all 195 acres

And 15 smaller fires. In all, 6,137 acres of ZIP code 91011 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 91011

Neighboring ZIP codes

  1. 91011 81% Very High · this area
  2. 91001 36% Very High
  3. 91020 40% Very High
  4. 91042 11% Very High
  5. 91103 37% Very High
  6. 91105 69% Very High
  7. 91206 83% Very High
  8. 91208 96% Very High
  9. 91214 76% Very High