This has been a widespread occurrence with that overnight frost/freeze of around a week ago, and many questions were sent to us about damage on a variety of plants (largely crapemyrtles and Japanese maples). There's nothing you can do except to give the plant more time, because the formation of new growth points from dormant buds under the bark may take a few weeks. Any dieback should be more distinguishable by late May or so, in which case leafless wood can be pruned off at that point.

In the meantime, it's important to make sure the roots have enough water, since expanding new leaves takes lots of readily-available moisture and we're still in a worsening drought thus far. (If it rains Wednesday, that will help for the short term, but won't put enough of a dent in the rain deficit we've accumulated over the past two years.) You can find guidance on our Watering Trees and Shrubs page.

Miri