I wonder if a special outfit could work for that? Shade the head and shoulders, ventilate maximally otherwise. The airflow is useful for cooling, though stops working after a certain point, then you need evaporation.

I agree but only partially. I noticed most people who complain about hot weather dress very badly.

The trick is ample light colored linen clothing that covers as much skin as possible. It might seem counter intuitive to cover your whole arms and legs, but linen is actually very good at evaporating your sweat and keeping you cool while protecting you from the sun.