Overexposure to sunlight can dehydrate the body.
Heat stroke is caused by overexposure to extreme heat, resulting in a breakdown of the body's heat regulating mechanisms.
Sunburn is an inflammation of the skin caused by overexposure to ultraviolet radiation from the sun.
Although sunburn itself is not a serious health problem in the short term, skin cancer from sun overexposure is in the early 2000s a growing problem in the United States.
Long-term effects of repeated sun overexposure and burning can cause premature aging and wrinkling of the skin.