Well Gary, if it makes you feel any better, post oak and blackjack oak are probably the two most fire tolerant species of oak there are!

Post Oak
Blackjack Oak

The subspecies of blackjack oak, Quercus marilandica Münchhausen grows in your area of Texas. In this area, Blackjack, along with Post oak, forms a semi-savanna area composed of forested strips intermixed with prairie grass glades along the eastern edge of the southern Great Plains. This semi-savanna is known as the Cross Timbers. The acorns of both species provide food for both whitetail deer and wild turkey. The area know as Cross Timbers is naturally fire prone and both oak species are well adapted to brush fires. I think your oaks will be fine! Glad to see the fish feeder survived the fires as well... Keep us updated with photos, I think we will all be amazed at how quickly the forest regenerates. The deer, turkey and particularly quail will be loving it!