noun
flashover
Technical firefighting term: the sudden ignition of all exposed combustible surfaces in an enclosed space when the temperature reaches a critical point.
消防士はフラッシュオーバーの危険性を常に意識している。
Firefighters are always aware of the danger of flashover.
Variant with a middle dot, sometimes seen in technical writing.
Backdraft is an explosion caused by sudden oxygen introduction into an oxygen-depleted fire, while flashover is the rapid ignition of all surfaces due to heat buildup.
From English 'flashover', a term used in fire science.