The good news is that, while it will be hot, it won't be as brutal as the NMSU game. Current forecast is for a 90-degree high. Which means most of the game will be in the mid to high 80s.
Best seats for the heat will be high on the west side upper deck toward the north end of the stadium.
If you're actually in the sun, especially on the east side, a baseball cap just isn't enough. Wide-brimmed hats, sunglasses and plenty of sunscreen. Obviously, dress cool.
If you have them, consider loose-fitting, loose-weave, long-sleeved shirts. You'll still need sunscreen under the shirt, but as I posted in another thread, it's how the Saudis handle nasty heat and sun, and nobody has more experience than they do.