What does the term “backdraft” refer to in firefighting?

The term "backdraft" specifically refers to a rapid combustion event that occurs when oxygen is introduced into a confined space filled with flammable gases. This phenomenon is often associated with the buildup of heat and unburned fuel (in the form of gases) in an enclosed area. When a door or window is opened, the influx of fresh oxygen can suddenly ignite these gases, resulting in an explosive fire outbreak.

Understanding backdraft is crucial for firefighters as it highlights the dangers of introducing oxygen into a potentially volatile environment. Proper training and awareness help responders anticipate this risk, allowing them to manage ventilation and approach the scene strategically to ensure safety and efficiency during firefighting operations.