stuff in the freezer may hold for a couple days, aside from icecream things. it has to thaw first, and if you don't open it, it has a pretty good seal.
hopefully power will be restored so you can get the pump going. when you do, try to get to a hardware store and get big floor fans and turn them on and leave them on as soon as there's bare floor, it MAY be able to stop pending mold.
so long