I get they are made for short durations but ventilation is all I can think of. not sure I'd want to be underground in that environment
Also, what would a person do if something fell on top of the entrance? Running out of oxygen and trapped inside, sounds like a really warm coffin.
agree. honestly it's just not the sort of disaster that a bunker is suitable for
In the conditions in which you're jumping into one of these you don't really want much ventilation - too much heat/smoke, and potentially even the fire burning through some of the oxygen from the contained air. Underground might not be an ideal place to be but IMO it's likely the best of a set of bad choices if you can't get out ahead of time - dirt is a pretty good thermal insulator.
I reckon you would give it a go if it was ‘try it’ vs ‘burn to death’
Probably better than inhaling smoke, but yeah. Some provide oxygen supplies, though.
