Flashover is defined as “the temperature point at which the heat in an area or region is high enough to ignite all flammable material simultaneously”.20 Carver firefighters spent a Sunday morning in a classroom learning the dangers of, warning signs and how to avoid being caught in a flashover. They then spent the afternoon feeling the heat and observing actual flashovers under controlled conditions in the Massachusetts Firefighting Academy’s Flashover Trailer. (Photo’s by Firefighter Danny Wilcox)