 Use air conditioning or a fan. Don't use a fan to blow extremely hot air on yourself. Use it to create cross ventilation. Lightweight, loose clothing. Don't obviously use your stove or your oven during the hot heat part of the day. The hottest part of the day is after 3 o'clock because it's had so much time to accumulate, right? So avoid being outside if you can. If you do have to be out in the heat, limit your outdoor activity to morning and evening hours.