We went biking this morning and biked the trails on the MCT system in Collinsville and Edwardsville region. We made two pits stops at the local Culvers to wash off with cold water and for fluid replacement. Then we were halfway on our ride and went to the local coffee shop in Edwardsville to wash off/soak up the A/c and enjoy a frozen frappicino. So it was possible to ride in this heat if you take precautions. I use a polar bottle with Hammer Heed, frozen on it's side , then add a small amt of cold water before we start the ride. It stays cold for a while for my comfort. I also use a camelbak filled with water and ice cubes so being hydrated is not a problem for me. The heat can make the ride miserable and I've found that the older I'm getting that I need to take a couple of pit stops to cool off for a few minutes.. part of my problem also is the 'hot flashes'