Napa County

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 271,009 acres · 265,969 state, 5,040 local 53%
  2. High 87,435 acres · 78,275 state, 9,160 local 17%
  3. Moderate 29,285 acres · 17,571 state, 11,714 local 6%
  4. Non-wildland 56,057 acres · Local Responsibility Area 11%
  5. Not mapped by CAL FIRE 63,284 acres · Mostly federal land 12%

  507,070 acres of land in all, 361,816 in the State Responsibility Area and 81,971 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 161 fires that burned here

  Map
  1. 2020 Hennessey Fire 305,352 acres in total · Cause: Lightning 165,387 acres here
  2. 2017 Atlas Fire 51,625 acres in total 45,222 acres here
  3. 2020 Glass Fire 67,484 acres in total 40,605 acres here
  4. 1981 Atlas Peak Fire Cause: Arson 33,606 acres here
  5. 2018 County Fire 89,831 acres in total 32,705 acres here
  6. 2004 Rumsey Fire 38,763 acres in total · Cause: Arson 32,684 acres here
  7. 1999 Sixteen Fire 37,893 acres in total · Cause: Arson 26,101 acres here
  8. 1964 C. Hanly Fire 55,961 acres in total 22,924 acres here
  9. 2017 Nuns Fire 55,798 acres in total 19,981 acres here
  10. 1988 Miller Fire 34,565 acres in total · Cause: Arson 11,601 acres here

  And 151 smaller fires. The most recent was the 2025 Pickett Fire, which burned 6,820 acres here. In all, 325,464 acres of Napa County 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