What does the term backdraft refer to in firefighting?

The term backdraft in firefighting refers to a sudden influx of air causing an explosion of flames. This phenomenon occurs when a fire is burning in a confined space with limited oxygen. If a door or window is opened, or if ventilation is increased in some way, fresh air rushes in. This influx can reignite the smoldering fire and lead to rapid combustion of gases that have built up, resulting in an explosive reaction.

Understanding this concept is crucial for firefighters because it can create dangerous and unpredictable conditions. Proper training in recognizing the signs of a potential backdraft allows firefighters to approach fires with greater caution and implement safer ventilation techniques. This knowledge helps prevent injuries and fatalities during firefighting operations.