We had a bad ice storm here in NH in the late 90's that took out
electricity for a week. I managed to patch the dozen holes in the roof
with a battery Makita panel saw recharged by a lunchbox-sized ham radio
generator but it taught me to have spare plywood and a generator large
enough to run power tools.

Snow mixed with salt cools down to about 5 F and can keep the contents
of the freezer frozen. Other food keeps well outdoors in coolers, which
protect it from freezing and small animals.

jw