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Our bodies are designed to adjust to variations in heat and cold. However, if the body becomes overwhelmed, heat and cold related emergencies can happen. Dehydration is one major factor that contributes to heat and cold related emergencies. Dehydration is one major factor that contributes to heat and cold related emergencies. 

Heat related illnesses include Heat cramps, Heat Exhaustion and Heat Stroke. Heat exhaustion is more serious than heat cramps, but does not usually become an emergency if treated early. Heat exhaustion occurs when a person is exposed to a hot environment, where fluids are lost through sweating and they are not replaced. A life threatening heat related condition is called heat stroke. At this point, the body has progressed past heat cramps and heat exhaustion.