| Backdraft: |
| Also known as a smoke explosion. When a fire burning inside an enclosed structure depletes most of the oxygen but the gases inside can remain super heated. A sudden introduction of oxygen into the environment, such as opening a door or window, can cause the gases to ignite with explosive force. Warning signs of possible backdraft include little or no visible flame, black smoke becoming dense gray yellow, smoke stained windows, and smoke escaping in intervals, or a puffing effect. |
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