What term describes a condition where all combustibles in a space ignite simultaneously?

The term that describes a condition where all combustibles in a space ignite simultaneously is flashover. This phenomenon occurs when the temperature in a confined area rises dramatically, reaching the ignition point of various materials present. During flashover, the heat generated by the fire increases so significantly that it causes nearby combustibles to ignite almost instantaneously.

Understanding flashover is critical for fire inspectors and firefighters because it represents a significant change in fire behavior that can quickly escalate a fire situation, transforming it from a manageable environment to a life-threatening one. Recognizing the early signs of flashover, such as rapid heat buildup and smoke conditions, can be vital for safety and effective firefighting strategies.

The other terms, while related to fire behavior, describe different phenomena. Flameover refers to a condition where flames spread rapidly along the surface of combustible materials, but it does not indicate simultaneous ignition. A firestorm is a large, intense fire that generates its own wind systems and can be a product of wildfires but is not specifically about simultaneous ignition. Sustained combustion is a term that describes a continuous burning state but does not capture the rapid ignition aspect of flashover.