If the bees can't fly, they won't be doing their job so may need some assistance. Flick the open blossoms with your finger nail a couple times or brush your finger across the open blossom and see if that helps.
If the problem continues after your weather issues are resolved and the bees are visiting your tomatoes, look at the amount of fertilzer they are getting (heavy feeders) or water (lack of). Too much water would cause the entire plant to show signs of stress.
Daisy
