What does the term "flashover" mean?

The term "flashover" refers to a rapid spreading of fire through a room or space, occurring when the entire area reaches a temperature that allows all combustible materials to ignite simultaneously. This phenomenon typically happens when the heat produced by a fire causes enough flammable gases to collect in the upper part of a room, leading to a sudden and intense increase in fire intensity.

During flashover, the fire can engulf the entire space, presenting a critical danger to both occupants and firefighters. Understanding this term is vital for fire suppression tactics and for recognizing the risks associated with fire behavior. It's important for firefighters to be aware of the signs that indicate a flashover may occur to ensure their safety and effectiveness during firefighting operations.