I don’t know what temperature my coop should be near. I live in a very sunny area in Texas. Should I be worried about over heat, and if I should how do I deal with it?
They are not happy and could have serious health problems (like death) if they are overheated. If you can, I would put your coop in a shady location or at least set up some screening for shade. Are there some dependable shade trees or bushes on your property?
They will also not lay well if they are overheated, and you may see more aggression and madness.
Quail can handle cold without much problem as long as they can escape the elements, but heat is a whole different story.
I keep mines in the shade and provide them with a fan during the hot parts of the day. You can mist them with water or make a shallow bird bath. The latter I don't like because they just poop in it. But they love it. I also put ice in their water containers.
I agree with finding shade, etc. My quail are in my garage, it stays pretty cool, especially with either the side door opened, or even the whole garage door - they are shielded from the direct wind, however. Even so, I often notice several panting like they are hot later in the day, and it really isn't very hot in there. They always have water, of course, and they are always in the shade.
Keep the quail out of direct sun - or at least provide them with a well ventilated area out of the sun as part of their cage/environment. I am keeping chickens for the first time. Their run and coop are facing East, but it is up against a building, so they only get the morning sun. Luckily we built an elevated coop approx 2.5' above the ground. They spend the vast majority of their time in the shade, under the coop...I guess I would too if I was wearing a down coat! We are often cloudy and most likely a lot cooler than where you are in Texas.