About 20 years ago on Christmas day, without prior notification, Florida Power & Light in South Florida decided to do a three hour rolling blackout because of unusually cold weather. Can you imagine the Christmas dinners that were ruined because the power company did not expect cold weather in December?
That is not comparable to what you are suffering now, but at least you have some warning. And with cold, you can pile on more clothes and cuddle under quilts. With heat, ???