Power outage: what do I do??

My whole apartment building's power has been out for about an hour now. It went out half an hour after the office closed, so I can't call them. I don't know if there is an after hour phone number I can call, I can't find it online anywhere.

I'm home alone with my pets, my husband is at work. I don't know what I can do. I tried flipping a couple breaker switches when it happened, but that won't help because it's not just my apartment, it's the whole building.