What phenomenon occurs as a smoke explosion from an oxygen-deprived fire?

The phenomenon that occurs as a smoke explosion from an oxygen-deprived fire is known as backdraft. A backdraft typically happens in a confined space where there is insufficient oxygen for combustion, leading to the accumulation of unburned flammable gases. When a door or window is opened, allowing fresh air to enter, this sudden influx of oxygen can ignite the gathered gases explosively, resulting in a violent burst of flames.

Understanding backdraft is crucial for fire investigators and firefighters due to the dangers it presents during fire suppression operations. Recognizing the indicators of backdraft, such as dark, turbulent smoke, high heat buildup, and signs of smoke movement out of openings, helps responders assess the situation and take appropriate action to prevent injury or further escalation of the fire.