It is estimated by comparing the flame to a nearby object of known height. It is measured on a slant when the flames are tilted due to effects of wind and slope.įlame Height: The average height of flames as measured vertically, up, and down. It is also important to identify whether the observation is for head, flank, or back of the fire.įlame Length: The distance measured from the average flame tip to the middle of the active flaming zone at the base of the fire. Observing Flames, as proxy for fireline intensity and indicator of tactical limitations, requires careful observation of flame length versus flame height. This guide identifies key terms for describing fire behavior and provides reference imagery and descriptive detail to aid observation reports.
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