ZIP code 92603

Orange County, including Irvine

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Report created October 27, 2026 at www.firezones.info/zip/92603

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    51% 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

    60% has burned

    Most recently the 2021 Bonita Fire, which burned 1 acre here, one of 4 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    61% 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 3,271 acres · 3 state, 3,268 local 51%
  2. High 1,971 acres · Local Responsibility Area 31%
  3. Moderate 333 acres · Local Responsibility Area 5%
  4. Non-wildland 818 acres · Local Responsibility Area 13%

6,392 acres of land in all, 3 in the State Responsibility Area and 6,389 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

Fires that burned here

  1. 1993 Laguna Fire Of 14,338 acres in all · Cause: Arson 3,859 acres
  2. 2001 Shady Canyon Fire Cause: Power lines 26 acres
  3. 2002 Shady Canyon Fire Cause: Power lines 3 acres
  4. 2021 Bonita Fire Cause: Vehicle 1 acre

In all, 3,859 acres of ZIP code 92603 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 92603

Neighboring ZIP codes

  1. 92603 51% Very High · this area
  2. 92612 34% High · 3% Very High
  3. 92617 1% Moderate · <1% High
  4. 92618 28% Very High
  5. 92651 93% Very High
  6. 92657 80% Very High
  7. 92660 1% Moderate · 1% High