ZIP code 91739

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 6,574 acres · 1,303 state, 5,271 local 36%
  2. High 523 acres · Local Responsibility Area 3%
  3. Moderate 450 acres · Local Responsibility Area 2%
  4. Non-wildland 4,232 acres · Local Responsibility Area 23%
  5. Not mapped by CAL FIRE 6,416 acres · Mostly federal land 35%

  18,195 acres of land in all, 1,303 in the State Responsibility Area and 10,476 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 31 fires that burned here

  Map
  1. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 12,067 acres here
  2. 2003 Grand Prix Fire 50,618 acres in total · Cause: Arson 12,015 acres here
  3. 1988 Texas Fire 12,096 acres in total · Cause: Arson 8,687 acres here
  4. 1988 Unnamed fire 4,358 acres in total 4,244 acres here
  5. 1980 Summit Fire 4,368 acres in total 3,748 acres here
  6. 1988 Unnamed fire 5,244 acres in total 2,870 acres here
  7. 1957 Morse Fire 2,474 acres in total 2,428 acres here
  8. 1936 Unnamed fire 4,704 acres in total 2,220 acres here
  9. 1913 Unnamed fire 3,086 acres in total 1,447 acres here
  10. 2014 Etiwanda Fire 2,142 acres in total · Cause: Miscellaneous 1,359 acres here

  And 21 smaller fires. The most recent was the 2014 Etiwanda Fire, which burned 1,359 acres here. In all, 13,494 acres of ZIP code 91739 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