Sunscreen can help prevent sunburn, but it's not 100% foolproof. At high altitudes sunburn can occur even on an overcast summer day. In addition, some medications can trigger severe sensitivity to sunlight.

Recognize sunburn early to lessen its severity. Most sunburn is superficial. Look for reddened skin and pain in the area of the burn.

In severe cases, the skin blisters and turns lobster red. Watch for signs of heat stroke as well — dizziness and headaches.

The first course of action in helping a sunburn victim is to move him or her out of the sun and relieve any discomfort.

• If the damage is minor, cover the skin with light clothing or a towel.
• Move the person into the shade — or indoors, if possible.
• Cool the skin by sponging it with cool water or by soaking the affected area in a cool bath or shower for 10 minutes.
• Encourage frequent sips of cold water.
• Use calamine lotion or an after-sun preparation to soothe the burn.
• Get medical assistance if the sunburn is severe.