Here I am about 60 miles west of Phoenix, stopped for fuel and re-hydration. By this time I had been riding for close to 4 hours with the temperature over 100 F. I find when it is over 105 F I need to stop about every 70-100 miles to re-hydrate and cool my core. Even with the stops, I feel pretty beat up after a few hours of riding when the temp approaches 110 F.
I've tried evaporative vests, long sleeves, short sleeves, H20 on my do-rag, with helmet, with out helmet and so on when it gets hot, and the bottom line is you just need to stop, drink lots of water and/or iced tea, and set in a cool place for 15 or 20 minutes until your core temp returns to normal. Then you can go out and do another 100 or so miles before you have to re-cool your core.
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