 Yeah, it's definitely a serious issue. The tour is already a really hard race. It's more than 2,000 miles of cycling over three weeks in the middle of summer. The asphalt they're riding on can be 140 degrees, and some stages are won by milliseconds. And overheating, it can decimate riders. Like this weekend, British cyclist Mark Cavendish threw up on his bike from the heat, and he almost fell to the back of the pack. Oh, my God.