There are about 3500 bees to the pound, so they say. Bees are remarkable at being able to withstand wet weather. They cluster up so that the rain washes away; hopefully not too many got blown around. They should dry out o.k. especially as you've given them some space for air and made sure they won't lose their roof again. The conditions might set them back a few days, but they are likely to survive fine. I've found colonies in the spring after cold wet wind storms where the covers are off, smashed in the trees several feet away and the bees hunkered down in a tight cluster. I covered them back up and to my suprise they seemed no worse off a week later.