Sorry, throwback from a week ago, going to revive an older point. With power outages, it's a small investment to get a generator compared to the cost of your livestock!
I just lost power for 3 days from that huge snowstorm. A lot of my friends still have no power. I have a generator, but it wasn't set up yet! Luckily, neither is my tank. But it's a good lesson to be prepared!