After the recent ice storm in Missouri, my power was out in my apartment. Without my permission, my landlord went and threw everything away out of my fridge and freezer. I was wondering if he had the right to do that, considering I was planning on saving a lot of the stuff since my apartment was 17 degrees inside; I didn't really think all that much would go bad.

No they should not have a right to do that. If they can show where it was causing a smell, and complaints were filed perhaps but in general no they can not come in and throw things out of your fridge