ZIP code 91311

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 16,821 acres · 13,398 state, 3,422 local 78%
  2. High 271 acres · Local Responsibility Area 1%
  3. Moderate 222 acres · Local Responsibility Area 1%
  4. Non-wildland 4,114 acres · Local Responsibility Area 19%
  5. Not mapped by CAL FIRE 29 acres · Mostly federal land <1%

  21,457 acres of land in all, 13,398 in the State Responsibility Area and 8,030 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 62 fires that burned here

  Map
  1. 1970 Clampitt Fire 115,537 acres in total · Cause: Power lines 15,690 acres here
  2. 2008 Sesnon Fire 14,701 acres in total 11,037 acres here
  3. 1981 Oat Fire 17,787 acres in total 10,031 acres here
  4. 2003 Simi Fire 107,570 acres in total 8,707 acres here
  5. 1957 Santa Susana Pass Fire 4,734 acres in total 2,704 acres here
  6. 2005 Topanga Fire 23,396 acres in total 2,116 acres here
  7. 1968 Brown Fire 1,799 acres in total 1,713 acres here
  8. 1967 Devonshire-Parker Fire 23,094 acres in total 1,345 acres here
  9. 1988 Keuhner Fire 3,819 acres in total 1,306 acres here
  10. 1993 Chatsworth Fire 1,931 acres in total 1,239 acres here

  And 52 smaller fires. The most recent was the 2025 Harold Fire, which burned 11 acres here. In all, 17,017 acres of ZIP code 91311 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