FACT Fire is black. Contrary to what is seen in movies, fires are not bright but extremely dark. The thick smoke created by the fire blocks out all light. You will be able to see more clearly along the floor, but you may still need to feel your way out. This is why planning and practicing your escape route is so important.
Fire is unbelievably hot.
Within a few minutes, a fire can generate temperatures of between 300 and 1200 degrees near the ceiling. One breath of this air can be fatal. However, even in these conditions, the temperature near the floor can still be under 100 degrees. This is why you must practice staying low and crawling out. Fire is fast moving.