LOL at the dopes who don't understand the obvious advantage of keeping the team fresh by not conducting EVERY practice in the blistering summer heat. You can prepare for and use the heat to your advantage without practicing in it EVERY day.
In fact, there is a point of diminishing returns if you're in that heat every day. It's the same theory behind most teams abandoning the antiquated practices of water deprivation and full blown contact in every practice. You wear guys out in the foolish attempt to make them tough.