other factors:
#father probably knows last location of child. Also knows layout of house even in dark (and has stubbed toes to prove it).
# smoke can knock you out and kill you easily.
#in a smoke filled house, you often literally cannot see your hand in front of your face. Usually you just see a dull glow from what is really a fairly bright fire through the smoke.
#it all depends on the fire, the smoke, your knowledge of the layout, and luck.

And I would always rather enter a burning structure with full bunker gear and breathing apparatus. Been there, done that.