The most obvious way to know is the good old sniff test.
If it doesn’t smell like it did when you left, you probably want to toss it. Don’t rely solely on this, though, and the U.S. Department of Health and Human Services does not recommend people taste food to find out if it’s still OK.
Check for that handy “refrigerate after opening” label. If you lost power for a significant amount of time, then those items are probably goners.
If you have a question about the aftermath of Hurricane Matthew or the return to Beaufort County, click here.