Woods fires spread slowly to moderately fast. The average fire is of moderate intensity, although heavy concentrations of fuel, especially draped fuel, may burn hot. Short-distance spotting may occur, but is not persistent. Fires are not likely to become serious, and control is relatively easy. Unattended brush and campfires are likely to escape.
Fires spread rapidly and short-distance spotting is common.
High-intensity burning may develop on slopes, or in concentrations of fine fuel. Fires may become serious and their control difficult, unless they are hit hard and fast while small. Spot fires are a constant danger. Direct attack at the head of such fires is rarely possible after they have been burning more than a few minutes. All fires are potentially serious.