Why do firefighters break out windows and cut holes in a roof during a fire?
Firefighters ventilate smoke and superheated gases for safety and visibility. This allows firefighters to get inside the building to find and extinguish the fire, thereby reducing property damage. This also reduces the chances of a possible back-draft explosion.

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1. Why do firefighters break out windows and cut holes in a roof during a fire?
2. Why do firefighters block traffic lanes at motor vehicle accidents and more lanes than are necessary?
3. Sometimes I see fire apparatus with lights and siren in operation proceeding through intersections and then after they go through they turn off their lights and slow down?
4. Why does my water turn brown when firefighters turn on fire hydrants?
5. Why do firefighters shop at the local grocery stores?
6. Why are smoke detectors so important?