It's common for newly transplanted shrubs, including weigela shrubs, to experience transplant shock. Their disturbed roots find it difficult to nourish the leaves with sufficient water, as an established shrub would be able to do. High winds simply exacerbate the problem; the result is leaf-wilt.
The positive actions you can take to help the weigela shrubs, at this point, after the fact, are limited (before the wilt damage took place, windbreaks would have been effective). But here's what not to do: Don't fertilize. Fertilizing would foster extra leaf growth -- which you do not want, since the weigela shrubs' disturbed roots are already struggling to function properly.
But do water your weigela shrubs regularly -- and play "the waiting game" to see how they pull through.
