I’ve been without power for over a week due to storm damage. If it is possible, get dry ice for the fridge and freezer. Use heavy gloves and wrap it in newspaper or paper bags so it lasts longer. I keep regular ice and/or frozen water bottle in a cooler with the perishables I need for that day. I use a grill or a portable cylinder gas cooking stove (like people doing food demos have).
When there is warning I always make a quiche (room temp ok for a few days), hard boil eggs, cook up lentils (makes cold salads, grain bowls), cook bacon (fine in cooler, fine room temp for a day) cook pasta spirals, elbows or shells for future meal/salads, pop a bunch of popcorn, wash and prep lots of vegetables that hold well like celery, carrots, scallions. I also start a jar of sprouts. If I have little potatoes I’ll boil them - future potato salad, hash or composed salad. I make as much coffee as I have thermos room for. I pick up a bunch of fried chicken for the cooler - can eat cold as is, use for sandwiches, add to pasta salad…
Hard boiled eggs do well in a cooler. Hard cheese and butter hold at room temperature. Many Asian style noodles just need hot water. Sandwich wraps can be made and wrapped and stored in the cooler - saves room and doesn’t smash easily. Bread, nuts, olives, hard sausage, hard cheese, dried fruits make easy meals.
I keep canned goods specifically for emergencies. Single slice packs of spam, tuna, fancy meat spreads from World Market/Cost Plus. Packets of condiments are handy. Any sort of canned bean can be used without heating. Jarred artichokes, roasted peppers jazz up a wrap, pasta salad or bean salad.
That’s all that I can think of off hand.
Hope the situation doesn’t last long.