LONE STAR FIRE BACKDRAFT EXPLOSION ★★★★★ 29 SEPT 2011 Browns Plains Grand Plaza HD

Backdrafts and flashovers
A backdraft is an explosive event at a fire resulting from rapid re-introduction of oxygen to combustion in an oxygen-starved environment, for example, the breaking of a window or opening of a door to an enclosed space. Backdrafts present a serious threat to firefighters,[1] even those with a high level of experience. There is some controversy surrounding the question of whether backdrafts should be considered a type of flashover

Although ISO 13943[3] defines flashover as "transition to a state of total surface involvement in a fire of combustible materials within an enclosure," a broad definition that embraces several different scenarios, including backdrafts, there is nevertheless considerable disagreement regarding whether or not backdrafts should properly be considered flashovers.[4] (A different viewpoint: [5]) The most common use of the term flashover is to describe the near-simultaneous ignition of material caused by heat reaching the autoignition temperature of the combustible material and gases in an enclosure; flashovers of this type are not backdrafts as they are triggered by thermal change. Backdrafts, on the other hand, are caused by the introduction of oxygen into an enclosure that may already be hot enough for ignition; thus, backdrafts are triggered by chemical change.

Part 4 of 7 (Before tea time)

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[melly000]

Good shot of the fire. Unfortunately I was stuck in grand plaza car park for and hour so I couldn't go have a look

[calebproductions94]

just crazy. pretty smokey when i drove through around 10.