Heat wave with 100+ degree temperatures

The Knoxville News Sentinel is reporting near record-high temperatures Friday across the state. The all-time record temperature was broken in Nashville at 109 (was 107). Chattanooga hit 106, tying its all-time record. Same with the Tri-Cities at 102. Knoxville tied its June record at 102 as well. Oak Ridge broke the June record at 104. The Tour de Rocky Top, taking place today (Saturday June 30) had its century ride (100 miles) cancelled this year due to the heat for safety reasons.

Cycling hydration

Having just read this article on cycling hydration myths, I would say that I learned a lot. Some of the material about how one is, believe it or not, often already partially dehydrated at the start of an afternoon ride I found out with personal experience. Most of the material is more pertinent to athletes and people who are otherwise riding long distances rather than commuters.

With that fact being noted, since we are still in summer, what are some tricks to beat the heat? Is added hydration the key? Do the same rules apply for those going on a walk out in the heat?