There are small AC and DC fans that would be a good idea to suck the overly hot air out.
My suggestion.. What kind of cage are you using? THose guys burrow right? If so make a borrow box beneath his cage completely out of the sunlight. Or I see some people cut holes in boxes and use something like a dryer vent to borrow up in the box.. it serves as a cool zone / borrow... Both of these are common practices in Uromastyx as its hard to properly create thermal zones in a reptile that needs (literally) anywhere from 120-140F and 80 on the cool zones.