It has been a few years since we've had a summer this dry, and the next few days are going to be hot as well. Fortunately not as hot as the Midwest has seen recently (upwards of 110* in some areas), but hot by our standards.
I read on a turfgrass disease blog recently that cool season grass roots pretty much quit growing around 77*F at 4" deep in the soil. Our temp on #13 Lake Course green yesterday was 82*F at 4" deep at 4:00pm. It is going to be a tough stretch for the rest of the summer.
What does the heat this mean for golfers? Not much other than tolerating some daytime irrigation to keep the grass alive until we get some cooler weather. Also, please be patient with some of my boys who are out trying to repair irrigation leaks and wiring issues. They are instructed to be courteous and get out of the way when golfers approach, but please give them a heads up when you are approaching so they know you are there.
Drink lots of water!