LOL, one trip in early August I had to go to the convention center, and left a 12 pack of diet coke in the trunk. I'm from Chicago, I know about pop bursting from the cold, not from the heat. I came out from the convention center and heard hissing......2 cans had exploded in the carton......kept it from making a bigger mess. Others were in various states of swelling. I took a can and tossed into a garbage can and it went off. Did the same several more times.
Never gave a thought to it, as it wasn't really, really hot, just 94 or 95. Since then I always have a cooler in the car. The cooler keeps it from popping even if the ice is gone.
Enjoy it, it's Vegas!