1 Causes of heat exhaustion include activity in a hot environment that can overwhelm the body's ability to cool itself, causing heat-related symptoms, and living in a hot environment without adequate access to water for dehydration. 2  Signs and symptoms of heat exhaustion include. 3  profuse sweating,  weakness,
The average amount of sleep that teenagers get is between 7 and 7 Â¼ hours. However, they need between 9 and 9 Â½ hours (studies show that most teenagers need exactly 9 Â¼ hours of sleep). Teenagers do not get enough sleep for a number of reasons:
Preschoolers should get about 11 hours of sleep each night, and children under the age of 13 should get about 10 hours of sleep a night. Teenagers should get nine hours of sleep a night.