Monrovia

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 2,864 acres · Local Responsibility Area 33%
  2. High 172 acres · Local Responsibility Area 2%
  3. Moderate 165 acres · Local Responsibility Area 2%
  4. Non-wildland 2,531 acres · Local Responsibility Area 29%
  5. Not mapped by CAL FIRE 3,063 acres · Mostly federal land 35%

  8,795 acres of land in all, 5,732 of it in the Local Responsibility Area. 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 23 fires that burned here

  Map
  1. 2020 Bobcat Fire 115,998 acres in total 3,709 acres here
  2. 1958 Unnamed fire 13,944 acres in total 2,982 acres here
  3. 1953 Monrovia Peak Fire 14,061 acres in total 2,790 acres here
  4. 1954 Monrovia Peak Fire 13,870 acres in total 2,695 acres here
  5. 1924 San Gabriel Fire 43,050 acres in total 1,938 acres here
  6. 1980 Stable Fire 6,049 acres in total 1,577 acres here
  7. 1900 Big Fire 16,961 acres in total 764 acres here
  8. 2016 Fish Fire 4,246 acres in total · Cause: Miscellaneous 611 acres here
  9. 1968 Canyon Inn Fire 19,056 acres in total 461 acres here
  10. 1917 Hastings Ranch Fire 349 acres here

  And 13 smaller fires. The most recent was the 2025 Eaton Fire, which burned 63 acres here. In all, 5,056 acres of Monrovia 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