I overheated on Saturday for the first time ever in my life. Felt like I was going to vomit and felt a little dizzy so I pulled off into Yorba park off the SART to sit down for 10 minutes and cool down. When I stood up there was a 3' diameter puddle of sweat on the ground. Humidity sure changes the game. I drank 150oz of water in 2.5 hours....that's 4lbs of sweat an hour.