I'm surprised no one brought this up, but, I offer additional advice, free of charge.

Ride on the MUP or on dirt and stay away from buildings when possible. There's a lot of heat that comes off of buildings and roads. Blacktop is bad--I rode 18 miles on the MUP Sunday and was fine, but when I got off at Pearl Road, I was steaming my last couple of miles! Four lanes of fresh blacktop and full sun changed my environment dramatically. It felt like 80 on the bikepath but was more like 110 deg. F on the road.

Also, if you have a choice between blacktop and cement roads--take cement. It's cooler.