Depending on the size of the outage this would be devistating. If you’re talking nation wide it would be chaos and a lot of death in the first two weeks. I’d recommend hunkering down for the first two weeks minimum. Walmart is not where you want to go. Lots of delusional takes in the comments here. You should have water, food, heat and some sort of power figured out for a minimum of a few weeks. This is a good reminder to always ₿ prepping. At least have 2 weeks worth.