Alot of those trees might very well die. but then again, they are oaks most of em, and they may not. Ours root systems don't go down very far, cuz in normal years they don't have to. That's really rocky ground out there, so I know it don't hold alot of moisture. Roots may go deeper there on their trees than ours do here.
That part of Texas looks pitiful right now, haymaker has had a couple decent lil rains in the last couple weeks from what he's said, but not enuff to make a big whole lotta difference, needs a whole lot more to pull it outta the drought.
I was there in late February, when things shoulda be lush and green with spring rains....it was parched brown in most places. Only green I seen was irrigated.