The mark left on a landscape by fire.

An individual incendiary fire.

Aircraft operating in accordance with clearances within control zones in weather conditions less than the basic Visual Flight Rules weather minima.

In the 1978 version of NFDRS, the herbaceous stage when cold temperatures kill herbaceous plants and force woody fuels into dormancy.

The heating of the earth's surface by both atmospheric infrared radiation and incoming solar radiation.

A coat with a fire resistant outer shell and a thermal and moisture barrier liner. Used primarily by structure firefighters.

A burn where the outer layer of skin is burned through and the second layer of skin (dermis) is damaged and is typically, a painful injury. Burns of this type cause reddening, blistering, and a mottled appearance.

A burn involving all the layer of the skin. Muscle layers below the skin and bones may also be damaged. Areas of the skin may be charred black or areas that are dry and white.

A minor thermal burn involving the outer layer of skin, i.e. "a sunburn". It is characterized by reddening of the skin and perhaps some swelling without blisters.

Small branches, needles, and leaves swept into a position by the wind and fixed by desiccation indicating the wind direction at the time of fire passage. One of the 11 NWCG categories of fire pattern indicators.