Being a Veteran I ate me pleanty of MRE’s (meal ready to eat.) Do a google search and you will learn all about them. I currently have 4 cases on hand. One MRE can feed a man for one day, they are very high in calories. Every MRE comes with a water activated heater so you can enjoy hot chow. I see them at gun shows and can also be found online, they are pricey.
I have also tried Mountain House freeze dried food. It’s good food but requires you to have some way to boil water. Depending on what kind of distaster zone your in you may want to buy a water filter as you will pour the water into the dehydrated food. Also unlike the MRE you will need to bring along your own spoons to eat.
Hope this helps, good luck.