I think you'll be okay. I am stating the obvious, but don't try to feed during this time. If he needs fresh water, bottled would be best if you have it. Goodness knows what kind of nasties will end up in the water supply from the flooding. Here in Missouri, we flood every year just about, and after a while it kind of becomes second nature.

I agree with Deborah. Once this crisis is past, get online and order a few shipping specific heat packs, the huge 60-80 hour ones, to keep on hand just in case. They are not very expensive, and will last for a long time when stored properly. Better to be safe than sorry. I keep a bunch on hand at all times since power outages in wintertime here are pretty common.

I wish you all the best, and hope things get back to normal for you as soon as possible.

Gale