Run before (or after) the sun.
Strong rays will make your run more super early or run after dark on the hottest days.
Dress the part.
Wear loose-fitting clothes, a visor, sunglasses and sunscreen.
Perform long runs on a loop.
Repeat a short, 30-minute-ish loop course. In one spot, leave a cooler with cold fluids, ice cubes, fuel and a dry towel. Stop at your station during every loop to keep your core temperature in check.