That portion of a fire edge opposite the head.

That portion of a fire backing directly away from and in relatively close proximity to the ignition area. The slowest spreading portion of a fire edge and generally opposite the head.

The use of fire to accomplish a specified objective.

The organizational element having responsibility within a functional area in the incident command structure such as operations, planning, logistics or finance.

An appropriate management response to wildfire or prescribed fire that results in curtailment of fire spread and eliminates all identified threats from the particular fire.

The range of options available for response to a wildfire.

Any fire which threatens to destroy life, property, or natural resources, and (a) is not burning within the confines of firebreaks, or (b) is burning with such intensity that it could not be readily extinguished with ordinary tools commonly available.

In the 1978 version of NFDRS, the herbaceous stage when herbaceous fuel moisture is between 120% and 30%.

Primary facility of the Multi-agency Coordination System (MACS); houses staff and equipment necessary to perform the MACS function.

Measured from the surface upward, the height to which relatively vigorous mixing occurs due to convection.