Any area where lack of flammable material obstructs the spread of wildfires.

Phase of combustion immediately following flaming combustion. Emissions are at twice that of the flaming combustion phase.

Combined processes of dehydration, pyrolysis, solid oxidation, and scattered flaming combustion and glowing combustion, which occur after the flaming combustion phase of a fire; often characterized by large amounts of smoke consisting mainly of tars.

To set fire to property deliberately and maliciously.

A separate radio frequency most commonly used in air traffic control which reduces frequency congestion by controlling the number of aircraft or other resources operating on a particular frequency.

Any written agreement giving one party a right, a service, or a commodity in exchange for a right, a service, or a commodity. Contracts include land use permits, purchase orders, equipment rental agreements, leases, etc.

An organization needed to support an incident which expands along with the Incident Command System.

A map maintained on a large fire to show at given times the location of the fire, deployment of suppression forces, and progress of suppression.

Portion of human-caused fires that have occurred on a protection unit chargeable to a specific risk source; calculated for each day of the week for each risk source.

The chance of fire starting as determined by the presence and activity of causative agents.