“If you can see your way, stay under the smoke,” Enterline said. “That’s where the oxygen is. Our habitual human instinct is to walk. That’s just what we do. Stand up. But that puts you right into the smoke layer where the fire effluent is. That’s where all the toxic gasses and fumes are. It’s really a cocktail of death. You want to stay under the smoke layer and crawl out.”

‘Stay low and go’: Harrisburg fire chief offers advice for surviving a potentially lethal fire – pennlive.com