The last Tokyo Olympics was the hottest on record. The Paris Olympics, which open next week, could be even hotter. Paris, with its wide boulevards, busy roads and galvanized roofs, is a heat island. In recent years, daytime highs have regularly exceeded 30 degrees in July and August. This, combined with high humidity and events scheduled around noon, creates a potentially dangerous environment for athletes.
Athletes experience a different risk of heatstroke than bystanders. Exercise generates a lot of heat in the body as a by-product of exercise. That heat is then dissipated…