Rancho Cucamonga

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 8,874 acres · 2 state, 8,872 local 30%
  2. High 1,123 acres · Local Responsibility Area 4%
  3. Moderate 916 acres · Local Responsibility Area 3%
  4. Non-wildland 18,792 acres · Local Responsibility Area 63%
  5. Not mapped by CAL FIRE 75 acres · Mostly federal land <1%

  29,780 acres of land in all, 2 in the State Responsibility Area and 29,703 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 39 fires that burned here

  Map
  1. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 7,956 acres here
  2. 2003 Grand Prix Fire 50,618 acres in total · Cause: Arson 6,674 acres here
  3. 1988 Texas Fire 12,096 acres in total · Cause: Arson 3,625 acres here
  4. 1988 Unnamed fire 4,358 acres in total 3,108 acres here
  5. 1980 Summit Fire 4,368 acres in total 1,769 acres here
  6. 2014 Etiwanda Fire 2,142 acres in total · Cause: Miscellaneous 1,694 acres here
  7. 1921 Unnamed fire 1,055 acres in total 868 acres here
  8. 1988 Unnamed fire 5,244 acres in total 648 acres here
  9. 1952 East Fire 545 acres here
  10. 1970 Fpd #92 (Al) Fire 499 acres here

  And 29 smaller fires. The most recent was the 2014 Etiwanda Fire, which burned 1,694 acres here. In all, 10,609 acres of Rancho Cucamonga 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