Last time we had a hurricane (Rita) she wiped out power at our house for 4 days. We never opened the freezer and the stuff in the freezer was perfectly fine, we even had ice left in the tray. We would periodically open the fridge and eat things before they went bad and we had a grill so anything that needed cooking from the fridge really didn't go to waste.
So if you don't open the freezer at all it should last a few days. Fridge, I'm not so sure.