This is why fires in furniture are such a danger in homes. In a real fire you may not have much time. Try to plan two ways out of every room. Plan to get out alive. Smoke from fires contains heat and the products of burning.
Smoke is poisonous.
The products of burning include the gases carbon monoxide, carbon dioxide and water vapour. Carbon monoxide and carbon dioxide are poisonous gases. Other products of the fire are irritating, causing coughing or streaming eyes. Smoke is difficult to see through. Smoke contains particle of unburnt carbon that make it look black.