ZIP code 91737

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 3,688 acres · 1,116 state, 2,573 local 57%
  2. High 408 acres · Local Responsibility Area 6%
  3. Moderate 307 acres · Local Responsibility Area 5%
  4. Non-wildland 2,042 acres · Local Responsibility Area 32%
  5. Not mapped by CAL FIRE 12 acres · Mostly federal land <1%

  6,458 acres of land in all, 1,116 in the State Responsibility Area and 5,330 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 20 fires that burned here

  Map
  1. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 4,104 acres here
  2. 2003 Grand Prix Fire 50,618 acres in total · Cause: Arson 2,836 acres here
  3. 2014 Etiwanda Fire 2,142 acres in total · Cause: Miscellaneous 783 acres here
  4. 1921 Unnamed fire 805 acres in total 567 acres here
  5. 1970 Fpd #92 (Al) Fire 500 acres in total 370 acres here
  6. 1964 Unnamed fire 240 acres in total 217 acres here
  7. 1925 Unnamed fire 189 acres here
  8. 1916 Unnamed fire 176 acres here
  9. 1966 Unnamed fire 173 acres here
  10. 1985 Archibald Fire 378 acres in total · Cause: Equipment use 158 acres here

  And 10 smaller fires. The most recent was the 2014 Etiwanda Fire, which burned 783 acres here. In all, 4,504 acres of ZIP code 91737 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