Ok. So, if there is some matter of time pressure, I would say you can make that determination with a 10-minute examination, and confirm that you want to do so. If there was no time pressure, I would just tell you. In either case, what you would learn (assuming you did decide to spend the 10 minutes if there was time pressure) is that the best way to treat his symptoms would be to remove any heavy or restrictive clothing and have him rest, preferably in a cool, damp, shaded place, and up his fluid intake.