What does a flashover indicate during a fire event?

Flashover is a critical phenomenon that occurs during a fire event, indicating full room involvement. This term refers to the dramatic transition when the fire's heat reaches a point where most combustible materials in the room ignite almost simultaneously, leading to a rapid spread of flames throughout the entire space. The temperature can rise to a level where the air itself becomes heated enough to ignite, resulting in a fully developed fire condition.

Understanding flashover is essential for fire investigators and responders because it significantly alters the dynamics of the fire environment, posing increased risks to occupants and firefighters. Identifying signs of potential flashover helps in assessing the fire's intensity and behavior, guiding safe and effective firefighting strategies.