Back Draft, Not Just a Movie!
Do you know what a backdraft is?
You may know what it is, or what it looks like, but do you know what causes it?
We have all seen the movie, whether you loved it or not…you remember the epic scene at the end.
Here is a great overview of what backdraft is from Wikipedia: A backdraft (North American English) or backdraught (British English) is the abrupt burning of superheated gasses in a fire, caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken.
Firefighters are taught to recognize backdraft conditions, due to space fire is contained in, smoke emitting from the fire (how dark is it? How fast is the fire burning?), no visible flame (fires often suffocate in this stage of burning due to lack of oxygen), the biggest sign I think of is the sudden movement of air inward when an opening to the affected space is finally made.
You can learn about all the signs of backdraft more here: https://www.usfa.fema.gov/blog/cb-051920.html