by 
Schonberg
ANSWERS: 1
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Heat exhaustion occurs when your body gets too hot. The body's core temperature is controlled by the hypothalamus, the part of the brain that also controls thirst and hunger. Normally, the body gets rid of excess heat by sweating. But if you are exposed to high temperatures (working outdoors in the summer, for example) for a long time and don't replace the fluids you lose, the body systems that regulate temperature become overwhelmed. As a result, your body produces more heat than it can dissipate. Heat exhaustion requires immediate attention, because it can progress to heat stroke, a serious (even fatal) illness.
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