What does the term "flashover" refer to?

The term "flashover" specifically refers to a sudden and rapid transition to full involvement of all combustible materials in a room or an enclosed space due to an extreme increase in temperature. This phenomenon occurs when the temperature reaches a point where all of the combustible materials ignite almost simultaneously, leading to a rapid spread of fire.

This sudden event poses significant hazards for firefighters, as it can occur within a matter of seconds and dramatically changes the dynamics of the fire situation. Recognizing the signs of potential flashover is critical for firefighters to ensure their safety and to develop strategies for effective firefighting and rescue operations. The recognition of flashover conditions can help firefighters make informed decisions about their attack strategies, ventilation needs, and personnel safety, which is why it is a key concept in fire behavior training.