Flashover

Flashover is a critical event in the progression of a fire that occurs when the contents of a room or enclosed space reach a high enough temperature to cause all exposed combustible materials to ignite nearly simultaneously. This results in a rapid and widespread fire that can fill the entire space with intense heat, thick smoke, and flames.
The conditions for flashover typically occur when the heat from the fire causes the temperature of the room to rise rapidly, reaching a critical point at which all combustible materials, such as furniture, curtains, and other items, ignite almost at once. This creates a significant increase in heat release and fire intensity, making it extremely hazardous for anyone inside the affected area.
Flashover is a significant concern for firefighters because it can lead to a sudden and uncontrollable fire, making it difficult to conduct rescue operations and extinguish the flames. It is also a major threat to building occupants, as the rapid spread of fire and the release of toxic smoke can make escape more challenging.
Preventing flashover and understanding its potential occurrence are crucial for fire safety. Firefighters and building occupants should be aware of the signs that flashover may be imminent, such as rapidly increasing temperatures, thick smoke, and turbulent air movement. Proper fire prevention measures, building design, and firefighting tactics are essential for minimizing the risk of flashover and ensuring the safety of individuals in the event of a fire.