What is "flashover" in terms of fire behavior?

Flashover is a critical phenomenon in fire behavior that denotes a rapid and intense transition in a fire's development. It occurs when the temperature in an enclosed space rises to the point where all combustible materials reach their ignition temperature almost simultaneously. This results in the fire spreading quickly throughout the entire area, leading to a dramatic increase in heat and flame.

Understanding flashover is crucial for firefighting tactics as it illustrates the importance of recognizing the signs of imminent danger, such as high heat levels and the presence of smoke, which can indicate that a flashover may occur soon. Recognizing the conditions that lead to flashover can enhance safety protocols and firefighting strategies, ultimately helping to protect firefighters and civilians alike.