A relative measure of the cumulative effect of daily drying factors and precipitation on fuels with a ten-day timelag.

Administrative entity that provides resources in response to the incident.

Chance that a firebrand will cause an ignition when it lands on receptive fuels.

This is a straight (nontapered) thread standard with the same threads per inch as the appropriate size iron pipe thread. It requires a gasket to seal and is the thread standard used by most U.S. industry.

Gross vehicle weight (GVW) in excess of the gross vehicle weight rating (GVWR) specified by the chassis manufacturer. Also an excess of weight over the gross vehicle axle weight rating (GAWR) specified by the chassis manufacture.

The documented location where a photograph was taken.

An identifiable association of fuel elements of distinctive species, form, size, arrangement, or other characteristics that will cause a predictable rate of spread or resistance to control under specified weather conditions.

An area of low pressure caused by intense heating of the earth's surface. High surface temperature causes air to expand and rise, resulting in low atmospheric pressure and induces a weak inflow of air at the surface. Air which rises in a heat low is very dry so clouds seldom form. Rising air above a heat low produces a warm upper level high and results in a net outflow of air aloft. Heat lows remain practically stationary over areas which produce them. 

A collapsible backpack portable sprayer made of neoprene or high-strength nylon fabric fitted with a pump.

A portable sprayer with hand-pump, fed from a liquid filled container fitted with straps, used mainly in fire and pest control.