The results of those factors in fire danger affecting long-term planning; involves consideration of past records and conditions and probable future trends.

An area that may be adversely affected by smoke from a prescribed burn.

Device that emulates the moisture response of specific classes of dead fuels, constructed from organic or inorganic materials (e.g., half-inch ponderosa pine dowels representing ten-hour timelag fuels).

Any soil or soil horizon containing at least 30% organic matter (e.g., muck, peat).

The basis for decision support for daily staffing of initial attack resources and other activities. A level of readiness and an indicator or daily preparedness.

The general surroundings of a site with special reference to its openness to winds.

A safety briefing emphasizes key safety concerns on the incident and is presented at each briefing session. The safety briefing should contain information to alert incident personnel of potential risk/hazard considered to be most critical.

Fire scar in a tree resulting from fire injury to the cambium without destruction of the overlying bark and therefore not readily discernible.

The secondary effects of fire such as tree regeneration, plant succession, and changes in site productivity. Although second order fire effects are dependent, in part, on first order fire effects, they also involve interaction with many other non-fire variables. 

The effects that concern the direct or immediate consequences of fire, such as biomass consumption, crown scorch, bole damage, and smoke production. First order effects form an important basis for predicting secondary effects such as tree regeneration, plant succession, and changes in site productivity, but these involve interaction with many other non-fire variables.