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Table 1 Wildfire behavior according to each wildfire severity class.

From: Post-Fire Recovery of Eucalypt-Dominated Vegetation Communities in the Sydney Basin, Australia

Class Wildfire severity class Wildfire behavior
1 Unburned No obvious burned vegetation in any strata
2 Low Ground layer burned, shrub layer scorched, canopy not burned
3 Moderate All ground and most shrubby vegetation burned, canopy not burned
4 High All ground and shrub layer vegetation incinerated, canopy scorched
5 Very high All vegetation incinerated, except stems <10mm, which survive
6 Extreme All vegetation and stems <10 mm totally incinerated