No, wait until later in the Spring before cutting them back because not all of the damage is clearly evident yet. Some stems may be partially damaged and be subject to dying back later in the season requiring a second pruning. After new sprouts emerge on the limbs cut them back several inches into healthy wood . My neighbor cuts his Crape Myrtle limbs back to ugly large stubs each Winter. He says that cutting them back helps to make them bloom better. My co-workers tell me that you shouldn’t prune them that way. Who is right?