First off -- good luck to you and your community! It's a good idea to stock up and be prepared for anything.

I'm sure you have all the basic ideas of nuts (especially macadamia and brazil) -- jerky and beef nuggets -- canned tuna and salmon and herring -- I like a jar of nut butter and a spoon if i am not strictly counting carbs -- pork rinds -- pork rinds dipped in almond butter! -- cheese if you can eat it first.

The real problem may be veggies. If you have celery it might last a few days after power goes out. Small jars of pickles, so you can open them and last a few days and run out and then open another? Olives will last a while. I love masala peas (spicy dried peas - about 6 carbs for 1/2 a cup.) not sure if you are trying to be super low carb or just avoid all grains and root veg -- If you would eat a few apples slices they last a while.

Good luck to you and yours. I hope you don;t have to deal with too mch of power outage, but hopefully that is all it is.