ZIP code 93021

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 26,883 acres · 15,375 state, 11,509 local 87%
  2. High 1,737 acres · 475 state, 1,261 local 6%
  3. Moderate 1,384 acres · 688 state, 696 local 5%
  4. Non-wildland 736 acres · Local Responsibility Area 2%
  5. Not mapped by CAL FIRE 2 acres · Mostly federal land <1%

  30,742 acres of land in all, 16,538 in the State Responsibility Area and 14,202 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 22 fires that burned here

  Map
  1. 2003 Simi Fire 107,570 acres in total 15,436 acres here
  2. 1970 Clampitt Fire 115,537 acres in total · Cause: Power lines 12,608 acres here
  3. 2006 Shekell Fire 13,618 acres in total 11,236 acres here
  4. 1953 Shields Lease Fire 11,775 acres in total 8,666 acres here
  5. 1946 Wiley Canyon Fire 21,266 acres in total 8,397 acres here
  6. 1958 Calumet Canyon Fire 17,214 acres in total 7,017 acres here
  7. 2009 Guiberson Fire 17,527 acres in total 6,478 acres here
  8. 1984 Grimes Fire 11,305 acres in total 2,291 acres here
  9. 2024 Mountain Fire 19,902 acres in total 941 acres here
  10. 2019 Easy Fire 1,806 acres in total 545 acres here

  And 12 smaller fires. The most recent was the 2024 Mountain Fire, which burned 941 acres here. In all, 22,035 acres of ZIP code 93021 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