The protection of structures from the exterior, with no interior access or activity.

An organization that oversees the management of multiple incidents or oversees the management of a very large or evolving situation with multiple ICS organizations.

A unified area command is established when incidents under an area command are multijurisdictional.

A fire that consume surface fuels but not the overstory canopy.

Prescribed burning under a forest canopy.

A number related to the probability of a firebrand igniting a fire.

The number of items or observations in a sample; usually denoted by lower case letter n.

Standards of the National Fire Protection Association are frequently adopted by insurance agencies such as the National Board of Fire Underwriters as a basis for their regulations and used as a guide for municipal, state, or provincial laws, ordinances, and regulations. 

The time between the end of evening civil twilight and the beginning of morning civil twilight, as published in the American Air Almanac, converted to local time.

Uniformity and size of bubbles.