Megram- Orleans Fire

1999125,231 acresCalifornia

The Megram- Orleans Fire burned 125,231 acres, about 196 square miles, across 3 counties. It began on August 23, 1999.

Watch how it happened

Megram- Orleans Fire · 1999

How it happened

See how severely each place burned, revealed outward from where it started.

About this replay
IgnitionAugust 23, 1999Historical replay — order not recorded
Final area125,231 ac
Revealed—
Counties3

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 Megram- Orleans Fire
Burn severity by class
SeverityShareAcres
Highmost vegetation consumed, soils altered10%12,856
Moderatemixed: many trees killed, some survive20%24,461
Lowsurface fire, most trees survive57%71,649
Unburned to lowislands inside the perimeter, little change13%16,011
Increased greennessvegetation greener after the fire than before0.2%254

10% of the area inside the perimeter burned at high severity, about 12,856 acres; 30% 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
Trinity CountyCA67,315
Humboldt CountyCA57,928
Siskiyou CountyCA82

Other large fires in California in 1999

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