What does the term "flashover" describe?

The term "flashover" specifically refers to a rapid and widespread fire development that occurs when all combustible materials in a room reach their ignition temperature almost simultaneously. This phenomenon typically results from the buildup of heat and gases within an enclosed space, leading to the flash ignition of these materials. During a flashover, the fire can transition from a manageable situation to an uncontrollable conflagration in mere seconds, creating a highly dangerous environment for both occupants and firefighters. Understanding flashover is crucial for fire safety and firefighting tactics, as it underscores the importance of rapid response and the need for effective ventilation to prevent such catastrophic events.