Ham Lake Fire
200770,575 acresMinnesota
The Ham Lake Fire burned 70,575 acres, about 110 square miles, across Cook County. It began on May 5, 2007.
Watch how it happenedHam Lake Fire · 2007
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 |
|---|---|---|
| Highmost vegetation consumed, soils altered | 6.2% | 4,410 |
| Moderatemixed: many trees killed, some survive | 26% | 18,451 |
| Lowsurface fire, most trees survive | 29% | 20,174 |
| Unburned to lowislands inside the perimeter, little change | 27% | 19,303 |
| Increased greennessvegetation greener after the fire than before | 0.5% | 361 |
| Not mappedcloud, shadow or water in the satellite images | 11% | 7,877 |
6% of the area inside the perimeter burned at high severity, about 4,410 acres; 32% 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.
| Cook County | MN | 34,749 |
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.