Call me a fair-weather biker, but I drove today due to the extreme heat. The temperature is supposed to top 100F here today for about the third day in a row, and the high usually hits during the same time I'm riding home in the afternoon. After biking on several 100+ days last summer, I decided no more. I would much rather ride in below-freezing temps than this kind of blast furnace. Plus the heat came on so suddenly this year that my body hasn't really acclimated to it. The high temperatures here went from the 70s-80s to 100+ with nothing in between.