Make your preparations early. By the end of 1999 panic buying could cause more problems than any short-term shutdowns. Condiments that you use often, pickles, salsa etc. If you heat food in its can, remove the lid first or it will explode. Store foods in a cool, dark place, safe from insects and rodents.
Dry foods keep well in metal or glass containers.
A few bay leaves added to dry foods help keep the weevils out. However, a camp stove or an outdoor grill will be very useful if the power is down for more than a few hours. They require ventilation so don't use them indoors. Rotate canned and dry goods so the oldest are always being moved to the front of the shelf. If the power fails, use items in the refrigerator first, then the freezer.