San Dimas

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 3,186 acres · Local Responsibility Area 32%
  2. High 1,813 acres · 2 state, 1,811 local 18%
  3. Moderate 536 acres · 1 state, 535 local 5%
  4. Non-wildland 3,068 acres · Local Responsibility Area 31%
  5. Not mapped by CAL FIRE 1,268 acres · Mostly federal land 13%

  9,871 acres of land in all, 2 in the State Responsibility Area and 8,601 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 56 fires that burned here

  Map
  1. 2002 Williams Fire 38,119 acres in total · Cause: Arson 2,036 acres here
  2. 1960 Unnamed fire 22,736 acres in total 1,990 acres here
  3. 1919 San Gabriel Fire 54,610 acres in total 1,828 acres here
  4. 1957 Unnamed fire 461 acres here
  5. 1981 Mull Fire 668 acres in total 381 acres here
  6. 1932 Morgan No. 24 Fire 550 acres in total 361 acres here
  7. 1927 Phillips No. 51 Fire 364 acres in total 355 acres here
  8. 1975 Via Verde Fire 331 acres here
  9. 1971 Lodi Fire 343 acres in total 250 acres here
  10. 1955 Puddingstone Fire 251 acres in total 248 acres here

  And 46 smaller fires. The most recent was the 2021 Kellogg Fire, which burned 12 acres here. In all, 4,529 acres of San Dimas 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