When does backdraft typically occur?

Backdraft typically occurs when oxygen is suddenly reintroduced to a smoldering fire. This phenomenon happens in situations where a fire has consumed most of the oxygen in the environment, causing it to smolder and produce smoke without burning brightly. When a door or window is opened, or if there are any other means for fresh air to enter the area, the influx of oxygen can lead to a rapid combustion of the accumulated gases. This results in an explosive fire event, which is characteristic of a backdraft.

This understanding is crucial for firefighters since recognizing the signs of an impending backdraft can help them take precautions to avoid injuries or fatalities. Proper ventilation and approaches to entering a structure with a potential backdraft risk are essential tactical considerations in fire operations.