"The place I work has backup generators for each critical facility ... so heat, light and probably internet are all available."

Even hospitals rarely keep more than three days of fuel on hand.

May I predict? If you have three buildings each with their own generators, ALL the generators will be run at the same time, all the people will stay in their own buildings, and they'll all run out of heat about the same time. That's instead of having all the people move to one building and running just one generator for three times as long.

Cynical Sue