An entity which oversees the preparedness activities for a particular ESF and coordinates with its primary and support agencies.

To be on fire.

A situation where personnel are unexpectedly caught in a fire behavior-related, life-threatening position where planned escape routes or safety zones are absent, inadequate, or compromised. An entrapment may or may not include deployment of a fire shelter for its intended purpose. These situations may or may not result in injury. They include "near misses."

Mapping unit which defines an area in terms of longitude and latitude distance. Two common scales are 1:24,000 quadrangles, which are 7.5' longitude x 7.5' latitude, and 1:62,500 quadrangles, which are 15' longitude x 15' latitude.

A pyrotechnic device specifically designed to initiate burning of a fuel mixture or propellant.

Area of change between advancing, lateral, and backing vectors.

Rain that freezes upon contact with objects on the ground.

The entire outer edge or boundary of a fire.

The vertical distance above ground scorched or blackened on a tree bole.

The area where the factors that principally determine home ignition potential during extreme wildfire behavior (high fire intensities and burning embers) are present. The characteristics of a home and its immediate surroundings within 100 feet comprise the HIZ.