I am 72, retired, but I do a lot of stuff outdoors. Worked outside most of the weekend. I wear Arctic Cool tshirts and wear shorts or loose fitting pants, depending on what I am doing. I wear white when working outside. Those who wear dark colors outside in the summer are their own worst enemy.
Due to some unforeseen circumstances, a fence I was going to build will now have to be built this summer, rather than last spring. I think I will need to set 163 posts and am thinking about doing it at night to avoid the sun and heat, lol.
Others have mentioned hydrating and I agree. I drink 8 to 10 bottles of water when it is hot like it is now, along with other fluids (no alcohol).
I wouldn't go to any day game in August or September and possibly early October. If your wardrobe is maroon with white numbers/lettering, buy something white with maroon numbers/lettering. No bevel if you can help it. Good luck!