Dont they know the faster you go the cooler it is? Lol in all reality though its probably for the best, most of us have common sense and drink plenty of water, a few people drink a whole lot of "adult" beverages and get really sick in the heat. Nobody wants to watch 20 grown men throwing up and being carted out in an ambulance lol.
I would think all those tracks would play it safe and buy a few of those huge intercooler fans that they use at football games and stuff, the big ones with the misting systems made into them, hell I made one with an old furnace blower and a water hose and it makes it seem 30 degrees cooler when you are within 20 feet of the thing lol