I used to work in an old people's home and one winter one of the residents "got out" somehow, through a fire door, which obviously couldn't be locked on the inside, it swung shut and latched behind her, and she died of hypothermia before she was found.
She was missing for at most, 1 hour and 45 minutes, as bed checks were 2 hourly.
It was cold but not 'that' cold, but she wasn't dressed for the outside, and was frail, and just froze.
It is so sad when something like that happens
