Three firefighters are recovering after a rollover crash Saturday afternoon in Madison County. | WTHR-TV

Fire rollover occurs when superheated, unburned gases rise and collect near the ceiling of an enclosed space. As these gases mix with oxygen and reach ignition temperature, they ignite suddenly, creating rolling flames across the upper layer of the room. This can happen even when materials on the floor have not yet caught fire. Flashover is a more extreme stage of fire development. It happens when heat from the fire raises the temperature of all exposed combustible surfaces in a room to their ig

🔥 FLAMEOVER (ROLLOVER): A LIFE-THREATENING WARNING 🔥 Flameover—also commonly called rollover—is not just “cool fire behavior.” It is a critical warning sign that conditions inside a compartment are rapidly becoming deadly. Flameover occurs when unburned fire gases produced by incomplete combustion accumulate at the ceiling level, mix with oxygen, and then ignite, causing visible flames to roll or lick across the overhead—often before full flashover. 🚨 Key warning signs of flameover: • Flames

Row houses can look routine, but they’re some of the deadliest fires we fight. In this clip from BuildingsOnFire, Christopher Naum breaks down how derelict occupancy can turn a “simple” rowhouse fire deadly. Watch, learn, and stay safe: https://ow.ly/MCGC50X8OgL | Fire Engineering