Heat means the sun is out and you very much want to avoid sunburn. You’re likely not wearing a parka during the summer heat, so you want to be protecting your skin that’s exposed from the sun. Be especially attentive to your most burn-prone areas, such as your nose, ears and back of your neck. Make sure to apply sunscreen with SPF 30 or higher on exposed skin and reapply every two hours. Your sweat can also wash away sunscreen or reduce its protection, so make sure you’re always reapplying throughout the day.