Definition & Operational Usage
Flashover is a critical fire phenomenon characterized by the rapid transition from localized combustion to a fully developed fire, occurring when the temperature of combustible materials and gases reaches their ignition point almost simultaneously. This event can lead to extreme heat and a dramatic increase in fire intensity, posing significant risks to firefighters operating within the Hot Zone. Not to be confused with backdraft, which involves a sudden influx of oxygen into a smoldering environment, flashover typically occurs in enclosed spaces with limited ventilation.
Category context: Core tactics, command, suppression, ventilation, search, and water supply terminology used on the fireground.
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