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Copied from:  http://www.wikihow.com How to Avoid Dehydration Dehydration is when your body is losing more fluids than it is taking in. Often heat related, its other names are "heat stress", "heat exhaustion," "heat cramps," and "heat stroke," but it can occur even in cold temperatures. It's a common problem, especially among young children, people exercising, and sick people. Thankfully, it's usually fairly preventable. 1 Prevent it by drinking lots of water daily!  By the time you feel thirsty, you are already dehydrated. Thirst can signal a water loss of 1% of body weight. Light-headedness can occur with as little as a 2% water loss. Water contains no calories and is great for your health in other ways. The amount of water you need is dependent on body weight. Hospitals use a formula to compute water intake needs, because even a patient in a coma needs water! For an adult weighing 150#, 8 oz. of water every hour for 8-1...

How to Prevent Heatstroke Heatstroke, also known as sunstroke, is a severe condition in which the body cannot cool itself through sweating and becomes overheated  . People are more likely to first hav e a heat cramp or heat exhaustion , which are less severe conditions. But when these problems are not treated and controlled in time, they lead to heatstroke. Heatstroke is common among people living in hot, humid climates. It happens mainly  due to a combination of dehydration and heavy exertion out in the sun . Other factors that increase your risk are drinking alcohol, wearing excessive clothing, strenuous physical activity, sweat gland dysfunction and cardiovascular disease. The main sign of heatstroke is a sudden increase in body temperature. Other symptoms include fatigue, headache and dizziness, decreased perspiration, muscle cramps or weakness, a rapid pulse rate, nausea and vomiting, flushed skin or redness, difficulty breathing, confusion and even loss o...