A backdraft is a deadly explosion that happens when a fire has been burning in a closed space with very little oxygen left. The trapped gases inside are extremely hot and full of unburned fuel vapors. As the fire burns, heat causes nearby materials to decompose in a process called pyrolysis. This releases flammable gases like hydrocarbons even when there isn’t enough oxygen for full combustion. These gases can stay inside at temperatures hundreds of degrees Celsius above normal air. When someone

A backdraft is a dangerous explosion that happens when a fire has been burning in a closed space (like a room or building) and has used up most of the oxygen. Here’s how it works step by step: ▶️The fire burns in an enclosed area and consumes most of the oxygen. ▶️The flames die down, but hot gases and smoke remain inside. ▶️When someone opens a door or window, fresh air suddenly enters. ▶️The oxygen mixes with the hot gases, and the fire reignites violently, causing an explosive burst of flames