In Winter, your attic can be your temporary root cellar
Some foods (root crops like potatoes, onions, carrots, beets, etc) plus cold loving crops like cabbage) store extremely well in a root cellar. By definition a root cellar is an underground structure that maintains a constant temperature of 55 degrees F or thereabouts due to the temperature of the Earth. The problem is you have to excavate it, and that's not possible for most folks right now either for time or city codes or whatever.
A lot of people have attics and these can get quite cold in Winter. Too cold without something to insulate these foods, for it can be as cold as 2-3 degrees F higher than the outside temperature. This does mean though that one could store some food items up there. It's not a bad place as long as you watch the temperature closely.
Some people have unfinished attics. Of course there are rafters, but no horizontal flooring. In a pinch, a sheet of plywood can be rapidly screwed down, and as long as you're careful about weight distribution, you can store quite a bit up there.
Oxygen is the enemy of freshness. It allows foods to go stale. It's why burying root crops in sand works. Thread: THE HOW TOO THREAD FOR SAND STORAGE OF VEGTABLES AND OTHER THINGS. FOOD TO LAST ALL YEAR...!
If course you can vacuum seal things too. Or you put them in buckets throw in an activated hand warmer (they work by oxidation) and they'll use up the oxygen in your bucket.
It's only temporary, but might help some folks. Here's someone using an unheated attic in this way:
[link to www.suntimes.com
The link below gives temperature ranges for the most common items you could store, and so you'd have to insulate some to achieve best preservation through refrigeration for your items.
[link to extension.missouri.edu