The amount, or mass of smoke produced per unit of time. For example: Emission Rate = Available Fuel x Burning Rate x Emission Factor.

Fire burning with a low flame and spreading slowly.

Concrete pad at a retardant base on which aircraft stand when being loaded.

Period of the year that normally comprises the fire season based on historical fire occurrence.

Objects displaying more stain deposits on the exposed surface of the object than on the protected surface of the object indicating the direction of fire progression at that location. One of the 11 NWCG categories of fire pattern indicators.

Accumulation in the forest of living or dead (mostly woody) material that is added to and rearranged by human activities such as harvest, cultural operations, and land clearing.

Self-leveling helibucket slung under a helicopter which can be filled by hovering over a water source.

A mixture of chemicals designed to produce heat, light, gas, smoke or noise.

An identifiable association of fuel elements of distinctive species, form, size, arrangement, or other characteristics. General fuel groups are grass, brush, timber, and slash.

Weather conditions which influence fire ignition, behavior, and suppression.