What does the term "flashover" refer to in firefighting?

The term "flashover" refers to a critical fire phenomenon characterized by a rapid spread of fire through an entire room or area. This event typically occurs when the temperatures in a room rise to the point where all combustible materials ignite almost simultaneously. At this stage, the fire becomes extremely dangerous because it transitions from a contained fire to one that can engulf the entire space in a matter of seconds.

Understanding flashover is vital for firefighters because recognizing the signs—such as a rise in heat and smoke density—can help them make informed decisions regarding tactics, evacuation of occupants, and their own safety. The ability to anticipate flashover can save lives and property, making knowledge of this phenomenon essential in firefighting strategies. This knowledge emphasizes the importance of proper training and situational awareness in fire suppression efforts.