In hydraulics, the pressure loss caused by raising water through hose or pipe to a higher elevation (roughly equal to one psi for every two-foot increase in elevation above the pump) (11.3 kPa per meter).

A general term referring to the recurrence of fire in a given area over time.

The elements of a community or natural area considered valuable by an individual or community that could be negatively impacted by a wildfire or wildfire operations. These values can vary by community and can include diverse characteristics such as homes, specific structures, water supply, power grids, natural and cultural resources, community infrastructure, and other economic, environmental, and social values.

Resources assigned to an incident and available for assignment.

Resources dispatched to an incident, that have not yet checked in.

Resources checked in and assigned work tasks on an incident.

Resources checked in and assigned work tasks on an incident.

Personnel and equipment available or potentially available for assignment to incident operations and for which status is maintained. Resources are described by kind and type.

The ultimate growth of a cumulus cloud into an anvil-shaped cloud with considerable vertical development, usually with fibrous ice crystal tops, and usually accompanied by lightning, thunder, hail, and strong winds.

The person in charge of fire retardant mixing operations with responsibility for quantity and quality of the slurry and for the loading of aircraft.