The rate of heat release, per unit area of the flaming fire front, expressed as heat energy/area/time, such as Btu/square foot/minute, or Kcal/square meter/second.

An assignment to an incident that requires a length of commitment.

Ratio of the amount of water to the amount of dry plant material in herbaceous plants (i.e., grasses and forbs).

The ratio of the volume of the foam in its aerated state to the original volume of the non-aerated foam solution.

The surrounding conditions, influences, and modifying forces of topography, fuel, and weather that determine fire behavior.

A special forecast issued to fit the time, topography, and weather of a specific incident. These forecasts are issued upon request of the user agency and are more detailed, timely, and specific than zone forecasts. Usually, on-site weather observations or a close, representative observation is required for a forecast to be issued. 

A special weather forecast for a specific incident prepared by a meteorologist on site at or near the incident area.

Includes any off-incident support provided to an incident. Examples would be agency dispatch centers, airports, mobilization centers, etc.

A forecast, issued daily during the regular fire season to resource management agencies, that is intended for planning of daily fire management activities, including daily staffing levels, prevention programs, and initial attack on wildfires.

The number of hours in a daily tour of duty.