As summer heat waves have affected more than 50 million people across the country, many places in the west are experiencing record highs. So how to stay cool during a heatwave? Here are some hacks. Put your sheets in the freezer until you’re ready to go to sleep, then make the bed and enjoy a cool night’s sleep. Creating your own cooling pad is easy. All you need is a sock and some rice. Peppermint tea can also work as a natural coolant for the body.