For motorcyclists, heat can be even more dangerous than cold, since many of us just stop riding when the temperature gets too low, but we’re not equally cautious in extremely hot weather.
As with hypothermia, the first step in dealing with hyperthermia or heat stroke is recognizing the symptoms. Basically, when you stop having to go to the bathroom or when you stop sweating, you’re already in trouble. Watch also for rapid pulse, a throbbing headache, dizziness, nausea and confusion.
If you experience any of those symptoms, stop riding.
The cure for hyperthermia is simple: cool down and drink plenty of fluids, well beyond quenching your thirst. That should be easy if you’re riding through a populated area, but if you’re caught far from civilization, you should find shade and drink any water you’ve been smart enough to carry on your bike.
Stay calm and remain shaded until you feel better. That may mean waiting until sundown. Once your core temperature is back down, you can begin riding again. Just take it easy and stop for a more thorough warmup as soon as possible.
When you do resume riding, don’t be tempted to take your jacket off because that can dry you out even faster.
Also remember that long days on a bike, or even short ones on hot days, can dry you out much faster than you realize. Either use a hydration system or take frequent breaks to drink fluids.
If you find your mind getting a bit foggy, like you can’t decide whether to stop for a break or not, take it for the warning sign that it is and stop. Are you hungry? Thirsty? Tired? Figure out what’s wrong and fix it before you get back on the bike.