From Steven Radonis
Just wanted to share one of the things I do to prepare for a storm.
Aside from the normal things (batteries, water etc.), I fill empty milk containers with water, then freeze them and try to fill all the empty spaces in my refridgerator and freezer with these frozen containers. By taking up the volume of empty space, your fridge/freezer will stay cold for a much greater time (probably days) than not doing anything.
I hope this helps!
Editor’s note: The USDA notes that a full freezer will stay cold for 2 days without power if left closed. A fridge lasts more like 4 hours. Here’s a video with some more hints on preserving food during a power outage: