Big Horn Fire

202451,042 acresWashington

The Big Horn Fire burned 51,042 acres, about 80 square miles, across Klickitat County. It began on July 22, 2024.

Watch how it happened

Big Horn Fire · 2024

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

Detections277satellite 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 (134 VIIRS and 143 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 Big Horn Fire

Burn severity by class
Severity	Share	Acres
Lowsurface fire, most trees survive	94%	48,100
Unburned to lowislands inside the perimeter, little change	5.7%	2,902
Not mappedcloud, shadow or water in the satellite images	0.1%	29

Most of the area inside the perimeter burned at low severity or not at all.

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

Klickitat County	WA	51,019

Other large fires in Washington in 2024

Swawilla I Fire53,784 acres
Retreat Fire44,668 acres

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