Avoid peak exposure. The risk drops considerably before and after those times, says Dr. Weiss. It s also easier to burn more severely on a hot day because the heat increases the effects of ultraviolet radiation. In addition, you ll burn faster at high altitudes and in the mountains because there is less atmosphere to block ultraviolet rays, he adds. Beware of clouds.
People often discount the risk of getting sunburned on cloudy or overcast days.
But you can t let your guard down even when the sun is in hiding, says Dr. Weiss. Up to 80 percent of ultraviolet rays can penetrate the clouds. This book is intended as a reference volume only, not as a medical manual. The information given here is designed to help you make informed decisions about your health. It is not intended as a substitute for any treatment that may have been prescribed by your doctor.