ZIP code 91016

Los Angeles County, including Monrovia, Mayflower Village and South Monrovia Island

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Report created October 27, 2026 at www.firezones.info/zip/91016

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    43% Very High

    All 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

    27% has burned

    Most recently the 2020 Bobcat Fire, which burned 806 acres here, one of 17 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    38% 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 2,324 acres · Local Responsibility Area 43%
  2. High 172 acres · Local Responsibility Area 3%
  3. Moderate 165 acres · Local Responsibility Area 3%
  4. Non-wildland 2,774 acres · Local Responsibility Area 51%
  5. Not mapped by CAL FIRE 23 acres · Mostly federal land <1%

5,457 acres of land in all, 5,434 of it in the Local Responsibility Area. 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. 2020 Bobcat Fire Of 115,998 acres in all 806 acres
  2. 1953 Monrovia Peak Fire Of 14,061 acres in all 674 acres
  3. 1958 Unnamed fire Of 13,944 acres in all 612 acres
  4. 1954 Monrovia Peak Fire Of 13,870 acres in all 612 acres
  5. 1980 Stable Fire Of 6,049 acres in all 445 acres
  6. 1917 Hastings Ranch Fire Of 350 acres in all 247 acres
  7. 1900 Big Fire Of 16,961 acres in all 169 acres
  8. 1953 Unnamed fire Of 95 acres in all 94 acres
  9. 1909 Unnamed fire Of 104 acres in all 85 acres
  10. 1910 Unnamed fire 81 acres

And 7 smaller fires. In all, 1,475 acres of ZIP code 91016 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 91016

Neighboring ZIP codes

  1. 91016 43% Very High · this area
  2. 91006 13% Very High
  3. 91008 80% Very High
  4. 91010 35% Very High
  5. 91024 49% Very High
  6. 91706 4% High
  7. 91731 No hazard zones
  8. 91732 1% High
  9. 91780 No hazard zones