Types of Fires
NFDRS recognizes four types of fires.
1. Ground Fires burn in natural litter, duff, roots or sometimes high organic soils. Once started they are very difficult to detect and control.
2. Surface Fires burn in grasses and low shrubs (up to 4' tall) or in the lower branches of trees. Surface fires may move rapidly. Ease of control depends upon the fuel involved.
3. Crown Fires burn in the tops of trees. Once started, they are very difficult to control since wind plays an important role in crown fires.
4. Spotting Fires can be produced by crown fires as well as wind and topography conditions. Large burning embers are thrown ahead of the main fire. Once spotting begins, the fire will be very difficult to control.
Read more about this topic: National Fire Danger Rating System
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