In fire investigation terminology, what is meant by "flashover"?

Flashover refers to a rapid and nearly simultaneous ignition of all combustible materials in a room or an area, resulting in a sudden and uncontrollable spread of fire. This phenomenon occurs when the heat in the compartment rises to a temperature that allows all surfaces in the room to ignite almost at once. The process is often triggered when the heat released from the combustion of materials reaches a critical threshold, causing the flammable gases produced by burning materials to ignite.

Understanding flashover is crucial in fire investigations because it helps investigators determine fire dynamics and patterns, including how a fire progressed and spread. Recognizing the signs of flashover can also inform firefighting strategies and safety precautions in fire situations.

The significance of flashover in the context of fire behavior emphasizes its role in understanding how quickly and dangerously a fire can escalate, which is essential for both prevention and response efforts.