Hennessey Fire

Wildfire in Napa, Yolo, Solano and Lake counties, August 2020

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Printed October 28, 2026 from www.firezones.info/fire/8130/hennessey-fire-2020

Key facts

Started August 17, 2020
Contained September 16, 2020, after 30 days
Burned 305,352 acres
5th largest fire of 2020 and 10th largest in California's records
Cause Lightning
Buildings 1,191 destroyed, 207 damaged
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Where it burned

Counties

  1. Napa County 165,387 acres
  2. Yolo County 75,646 acres
  3. Solano County 41,789 acres
  4. Lake County 21,064 acres
  5. Colusa County 1,464 acres

Communities

  1. Moskowite Corner 1,816 acres
  2. Allendale 984 acres
  3. Vacaville 715 acres
  4. Rumsey 386 acres
  5. Guinda 195 acres
  6. Fairfield 195 acres
  7. Hartley 89 acres

Acres are the land the fire burned in each county and community, and places where it burned less than an acre are not listed. Communities are cities, towns and the unincorporated places the Census Bureau names, so land outside any of them is counted only in its county.

Buildings damaged

  1. Destroyed Over 50% damaged 1,191
  2. Major damage 25 to 50% damaged 21
  3. Minor damage 10 to 25% damaged 32
  4. Affected Up to 10% damaged 154

Buildings CAL FIRE inspected after the fire, by how badly each was damaged. Inspectors record homes, businesses and outbuildings within 100 meters of the fire, and cannot always reach every one, so the counts can differ slightly from other reports.

The same land, other fires

Burned before

  1. 1955 Gates Canyon Fire 5,552 acres shared
  2. 1957 E.g. Williams Fire 3,723 acres in total 3,523 acres shared
  3. 1957 Peterson Estates #2 Fire 6,257 acres shared
  4. 1972 Pocket Gulch Fire 10,431 acres in total 9,987 acres shared
  5. 1973 Signal Hill Fire 4,386 acres shared
  6. 1976 Martell Fire 3,783 acres shared
  7. 1981 Atlas Peak Fire 33,606 acres in total · Cause: Arson 7,406 acres shared
  8. 1985 Miller Fire 3,622 acres shared
  9. 1988 Miller Fire Cause: Arson 34,386 acres shared
  10. 1995 Priest Fire 5,113 acres in total 5,052 acres shared
  11. 1999 Sixteen Fire 37,893 acres in total · Cause: Arson 20,402 acres shared
  12. 2000 Berryessa Fire 4,860 acres in total · Cause: Vehicle 4,801 acres shared
  13. 2004 Rumsey Fire 38,763 acres in total · Cause: Arson 34,387 acres shared
  14. 2014 Monticello Fire Cause: Miscellaneous 6,599 acres shared
  15. 2015 Wragg Fire Cause: Vehicle 8,040 acres shared
  16. 2015 Jerusalem Fire 25,118 acres in total 14,495 acres shared
  17. 2015 Valley Fire 76,085 acres in total 3,639 acres shared
  18. 2016 Cold Fire 5,730 acres in total 5,616 acres shared
  19. 2017 Atlas Fire 51,625 acres in total 10,907 acres shared
  20. 2018 County Fire 89,831 acres in total 67,443 acres shared

And 128 more fires that burned less of the same land. Acres are the land each fire shares with the Hennessey Fire, and fires that shared 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

Sources

Fire history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Building damage
CAL FIRE Damage Inspection
Updated 19 October 2026

This site is independent and not affiliated with CAL FIRE or the CPUC, so for an official determination, check with the agency or your city or county. How we read the data