County Fire

201892,393 acresCalifornia

The County Fire burned 92,393 acres, about 144 square miles, across 2 counties. It began on June 30, 2018.

Watch how it happened

County Fire · 2018

How it happened

Watch it burn in the order satellites saw it, coloured by how severely each place burned.

About this replay

Date (UTC)—Historical replay

Burned so far—acres

High severity—of the area so far

Detections2,832satellite fire pixels

Fire milestones

Burn severityHigh, Moderate, Low, Unburned to low, Increased greenness

Burning nowAreas reached in the last half day of satellite passes

Washington, D.C., to scale61 square miles of land, drawn at the fire’s scale

Timing: NASA FIRMS satellite fire detections (2,308 VIIRS and 524 MODIS) inside the final perimeter; each place takes the time of its nearest detection, so the order is satellite-observed but interpolated between passes, roughly every 12 hours. Severity: Monitoring Trends in Burn Severity (USGS, U.S. Forest Service), mapped from Landsat after the fire.

How severely it burned

Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.

Map of burn severity across the County Fire

Burn severity by class
Severity	Share	Acres
Highmost vegetation consumed, soils altered	27%	24,947
Moderatemixed: many trees killed, some survive	35%	32,604
Lowsurface fire, most trees survive	35%	32,392
Unburned to lowislands inside the perimeter, little change	2.6%	2,441

27% of the area inside the perimeter burned at high severity, about 24,947 acres; 62% burned at moderate or high severity.

Monitoring Trends in Burn Severity (U.S. Geological Survey and USDA Forest Service). Classes come from the change in a Landsat burn index (dNBR) between images before and after the fire; acres are each class’s share of the fire’s mapped area.

Where it burned

Acres inside each county, measured from the satellite-mapped perimeter.

Acres burned by county

Yolo County	CA	59,127
Napa County	CA	33,322

Other large fires in California in 2018

Ranch Fire426,721 acres
Carr Fire233,526 acres
Camp Fire153,619 acres
Woolsey Fire97,955 acres
Ferguson Fire97,379 acres
Delta Fire63,688 acres
River Fire48,885 acres
Hirz Fire46,660 acres

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.