One thing I've noticed when coping with severe heat, and often get laughed at, is to wear a wet t-shirt. It's incredible how instantaneous the relief is. I just take an ordinary cotton shirt, fold it neatly into a small packet and run it under the tap. Press it a few times so the water runs through the folded package and then unfold. Don't wring it as it will stretch the cloth beyond repair, and put it on. Initially it will feel weird and uncomfortable, but once it's on I feel my head getting more relaxed by the instant. You can even take a comfortable jog outside in 35C in the blasting sun for up to 10 minutes. The shirt will be near dry by than and it will get uncomfortable very quickly, but think of the possibilities! On extreme days I just wetten the shirt for 4-5 times a day and put a fan on me. No sweat when facing >35 degrees inside.
I tried it with pants as well but if you do so, don't wetten it above the pockets as the multi-layer will make it damp without much of the adiabatic cooling perks.
I tried it with pants as well but if you do so, don't wetten it above the pockets as the multi-layer will make it damp without much of the adiabatic cooling perks.