Thanks for all of the suggestions. I decided to just get a new generator to replace the one that got drowned last summer. I did grab a few hand warmers in case I ever need them. I've also still got my hot water bottles, but I can't rely much on them much during a power outage. I have an all-electric house, so when my power goes out I only have one shot at hot water. But they work long enough for me to get the generator running...