Use Sunscreen and Drink Water: Everyone loves a sunny day, but exposure to the sun affects your body. Without sunscreen, you can be seriously burned. The sun’s rays can also cause life-long skin damage and skin cancer. To protect yourself always choose “broad spectrum” sunscreen rated from 15 to 50 SPF, or clothing that covers your skin, and reapply sunscreen regularly throughout the day. The sun can also dehydrate you quickly. Drink lots of water and avoid alcohol, which contributes to dehydration. Lifeguards treat people for heat exhaustion and heat stroke from time to time. If you feel ill, be sure to contact a lifeguard.