BAER burn severity
Fire effects
Very low
Mosaic of unburned and very-low-severity ground fire.  Consumption of ground cover and vegetation mortality are minimal.  Canopy remains vigorous and green.  Morality of trees and shrubs is slight.
Low
Vegetation is lightly scorched, few large trees are killed, very-small-diameter fuel is consumed.
Moderate
Much of the litter has been consumed. Fine fuels close to the ground may be all consumed and trees may exhibit 40-80% mortality.
High
Tree crowns are completely consumed, few to no leaves or needles remain on trees, and mortality can be assumed to be close to 100%.