ZIP code 91748

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 4,084 acres · 3,164 state, 919 local 45%
  2. High 281 acres · 6 state, 275 local 3%
  3. Moderate 267 acres · 4 state, 263 local 3%
  4. Non-wildland 4,470 acres · Local Responsibility Area 49%
  5. Not mapped by CAL FIRE 21 acres · Mostly federal land <1%

  9,123 acres of land in all, 3,175 in the State Responsibility Area and 5,927 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 19 fires that burned here

  Map
  1. 1970 Fullerton Fire 3,381 acres in total 2,988 acres here
  2. 1955 Hacienda Fire 1,148 acres in total 376 acres here
  3. 1967 Powder Fire 245 acres here
  4. 1928 Brea Shell No. 24 Fire 166 acres here
  5. 1939 La Habra No. 33 Fire 1,521 acres in total 154 acres here
  6. 1949 Vejar No. 168 Fire 122 acres here
  7. 1944 Howard Fire 147 acres in total 87 acres here
  8. 1928 Shell Oil No. 11 Fire 91 acres in total 81 acres here
  9. 1979 Unnamed fire 68 acres here
  10. 1979 Unnamed fire 41 acres here

  And 9 smaller fires. The most recent was the 2020 Canyon Fire, which burned 7 acres here. In all, 3,922 acres of ZIP code 91748 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