Wow, what a hard thing to plan for. After reading some helpful posts last year, I will try the following when I know a storm is coming: pocket heating packages, closed jar of water or smooth clean rock/s put in the incubator whild it's running to bring up to heat temp & hold it for a while. The heat can be kept up by replenishing with the heat packets (or even a jar of warm water could be replenished if you have a way to heat the water like for camping out). Happy hatching!