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

90K views · 695 reactions | Fire behaviour: Backdraft • As oxygen is re-introduced to the under ventilated fire it’s able to burn more efficiently again. You see the violent, turbulent smoke being expelled under pressure from all gaps before igniting it’s way along the unburnt products of combustion with explosive force. &✍️ ~ @ukfiremanshipculture | The Hook & Can | Facebook