I am not advising anybody to go full survive-off-the-land prepper. It is best to think carefully about what happens if the grid goes down and the stores have nothing for say 2-3 weeks.
If you can afford it --- have enough to get you through a month of scarcity. Get a solar panel and lithium rechargeable battery bank. Have food that does not need water to prepare. Have a way to clean water you find when you run out of stored up water. Have cash in many denominations. If you can, have some way of defending yourself and what you have.
We need to think about what happens if nobody is coming to help.