I have limited experience with riding in the desert heat. We have a whole different kind of hot to deal with down here in the southeast but I did take a couple of steps which cooled me off a bit.
I'm not a tall guy. Short arms and short legs. I liked the height of the stock bars on the 1300 much more than that of the 1100. I liked it enough that I really wanted to avoid using risers but the grips were a bit too far away. I had to keep my boys nestled in tight to the tank. Since I had the seat in the lowest position, causing the huge gap between the tank and seat, I was getting roasted in a place where I don't want it.
I finally relented and got some MCL risers. Not to raise the bars so much as move them back. It made a world of difference for me. Not only did it move my jewels off the tank, but it also made it possible to move the front of the seat up to the middle position, closing the gap somewhat.
Other than that, yeah, hot is hot and having that wonderful engine doing what it does best between your legs surely won't do anything to help matters. Drink lots of water and keep grinning.