Grass Valley Fire
201876,057 acresWashington
The Grass Valley Fire burned 76,057 acres, about 119 square miles, across 2 counties. It began on August 11, 2018.
Watch how it happenedGrass Valley Fire · 2018
How it happened
Watch it burn in the order satellites saw it, coloured by how severely each place burned.
How severely it burned
Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.
| Severity | Share | Acres |
|---|---|---|
| Lowsurface fire, most trees survive | 95% | 72,041 |
| Unburned to lowislands inside the perimeter, little change | 4.2% | 3,184 |
| Not mappedcloud, shadow or water in the satellite images | 1.1% | 828 |
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.
| Douglas County | WA | 68,045 |
| Grant County | WA | 8,027 |
Other large fires in Washington in 2018
- Boylston Fire66,325 acres
- Crescent Mountain Fire53,264 acres
- Cougar Creek Fire42,680 acres
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.