I’m ok in a stairwell. Cozy, some chips and salsa, radio, it’s cool. The high rise ain’t going anywhere. :)
Your chips would get soggy in the windblown rain and your radio would short out. Doors, even metal ones, tend to start failing in 150 mph wind gusts blowing through the broken windows that made you retreat to the stairwells. But at least the salsa would be edible, if a bit watery.
Good. Why don’t you test it out and report back if able?
Or, find someone who has done it and can give you advice.
Unless, you’re just having fun and playing “what if”....