One thing most people don’t understand about fires is that the smoke is the main event. It is what makes it nearly impossible to find your way out. Your eyes literally close to protect you from the smoke, and you can’t get them open again. It’s an involuntary defense mechanism. Smoke is also by far the thing most likely to kill you. Firefighters rarely see a burned body. Toxic smoke from a smoldering fire can kill you in your sleep before any flames are even visible. That’s why it’s so important to have a smoke detector with a working battery.
