Ash pit

After a wildfire has gone out, firefighters may detect ash pits from helicopters using infrared sensors.

There are several environmental factors that increase the likelihood of an ash pit being formed.

It may result from the presence of extensive root systems of trees and shrubs, as well as peat and deep duff covering mineral soil.

Examples include areas modified with heavy equipment, former bulldozer piles, as well as sawmill sites and timber yards.

Nearly translucent smoke that quickly dissipates may be visible emanating from an ash pit when it is between the observer and the sun.