What occurs during a flashover?

During a flashover, there is a rapid transition from uncontrolled combustion to a state where all combustible materials in the vicinity ignite almost simultaneously. This phenomenon is characterized by a dramatic increase in temperature and a corresponding rise in fire intensity. As the heat from the flames radiates and ignites surrounding materials, the entire environment can become engulfed in flames in a matter of seconds.

This process typically occurs in confined spaces where smoke and hot gases accumulate, reaching a critical temperature that leads to full ignition. Understanding this concept is crucial for firefighters, as recognizing the signs of an impending flashover can greatly enhance safety and tactics during firefighting operations.