that's why you never do an intense workout in the heat of the day.
He was indoors.
I did the running/walking part outside at 3:30 when I got home from work and then went swimming at an indoor pool a few hours later. After we finished swimming we went into the hot tub for a few minutes and when we got out I was about to pass out. I had to lay on the bleachers for a few minutes and apparently I was really pale. Lifeguards and other officials at the pool came up to me and gave me liquids and had to write a report and everything. It was embarrassing but it was my own fault.