Rapid increase in water flow which may result in a corresponding pressure rise.

That part of each 24-hour period when fires spread most rapidly; typically from 10:00 AM to sundown.

A set of physics and empirical equations that form a mathematical representation of the behavior of fire in uniform wildland fuels.

A task given to a person or team to perform based on operational objectives defined in the IAP.

Spacing of personnel while performing line construction activities.

Approved protection suit worn for smokejumping.

Objective ranking of protection units within an administrative group based on the number of human-caused fires for at least the past five years.

The organizational level having functional or geographical responsibility for major aspects of incident operations. A Branch falls between the Section Chief and the division or group in the Operations Section, and between the section and units in the Logistics Section. Branches are identified by Roman numerals or by functional area.

Reduction in water pressure between a pump or hydrant and a nozzle due to expenditure of pressure energy required to move water through a hose; includes losses due to back pressure, friction loss, elevation loss, and/or losses in fittings.

A source category of air pollution that generally extends over a large area. Prescribed burning, field burning, home heating, and open burning are examples of area sources.