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If an emergency vehicle is approaching from the opposite direction, you should pull over and stop. You have no idea if they are proceeding down the road, or are planning on turning into a driveway or intersection right in front of you. You are not required to slow down or pull over for emergency vehicles that are responding in the opposite direction on a divided highway.
Do not tailgate, draft, or follow a responding apparatus closely. Not only is this illegal, but you run the risk of collision as vehicles pull back out into traffic after the emergency vehicle goes by.
Heat and smoke rise, so cutting a hole in the roof and breaking out windows in strategic locations allows the smoke to vent upwards allowing cool air to enter the structure from below. We call this ventilation. When a hole is made in the roof, dark smoke and dangerous superheated gases escape because heat and smoke rise. This makes it much easier for the firefighters in the building to see. It also reduces the possibilities of backdraft (an explosion of heated gases) and flashover.
Another reason is to see how far the fire has progressed. One of the fastest avenues through which fires spread is the attic. Heat and smoke rise into the attic where fire can move quickly. Firefighters may go ahead of the fire on a roof, cut holes to access the attic and stop the fire from spreading. By venting the window of a room that’s on fire, it actually helps to contain the fire to the room of origin. Otherwise, heated gases spread throughout the inside of a structure. Breaking a window really prevents more damage than it appears to cause.