Imported Wordpress feeds suddenly dead

I'm getting this error on all my imported feeds out of the blue. "An error has occurred, which probably means the feed is down. Try again later."

I added 3 external feeds to my wordpress site recently, and they were working fine for a couple of weeks. Now they are no longer working. Any of them.

Anyone know what could be the problem? I would have thought if 1 broke, than it was the feed, but all of them? Has to be on my end.