Irvine

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 10,510 acres · 8 state, 10,502 local 25%
  2. High 4,266 acres · Local Responsibility Area 10%
  3. Moderate 1,392 acres · Local Responsibility Area 3%
  4. Non-wildland 26,023 acres · Local Responsibility Area 62%

  42,191 acres of land in all, 8 in the State Responsibility Area and 42,183 in the Local. State zones are the ones the State Fire Marshal designated, in effect since April 1, 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

• Fire history

  The 10 largest of 19 fires that burned here

  Map
  1. 2007 Santiago Fire 28,430 acres in total · Cause: Miscellaneous 5,632 acres here
  2. 1948 Green River Fire 53,080 acres in total 4,318 acres here
  3. 2020 Silverado Fire 12,469 acres in total 4,263 acres here
  4. 1993 Laguna Fire 14,338 acres in total · Cause: Arson 3,923 acres here
  5. 1967 Paseo Grande Fire 51,077 acres in total 3,696 acres here
  6. 1984 Loma Ridge Fire 1,435 acres in total 1,271 acres here
  7. 1931 Unnamed fire 7,760 acres in total 472 acres here
  8. 1914 Unnamed fire 18,755 acres in total 425 acres here
  9. 1997 Baker Fire 6,320 acres in total 183 acres here
  10. 2007 261 Incident Fire 90 acres in total · Cause: Vehicle 67 acres here

  And 9 smaller fires. The most recent was the 2021 Ridge Fire, which burned 5 acres here. In all, 9,981 acres of Irvine 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