Why do you need to get down low when there is smoke in the room?

When there is a fire in an enclosed area the air in the room begins to heat up. Since heat rises, the smoke from the fire is pushed up with it. Smoke inhalation can have immediate consequences (ex: lack of oxygen; burning of the lungs) or, depending on the type of fire/smoke, it can also lead to long-term health problems. Staying close to the ground helps you inhale as little smoke as possible. Smoke can also be a hazard because it disorients you. If you look under the smoke you can see your surroundings more clearly.