Heat cramps, heat exhaustion and heat stroke
Exposure to abnormal or prolonged amounts of heat and humidity without relief or adequate fluids can cause various types of heat-related illness. Children and adolescents adjust more slowly than adults do to changes in environmental heat and are thus more vulnerable to heat-related illnesses.
Why your child might be vulnerable
Children also produce more heat with activity than adults and sweat less. Sweating is one of the body's normal cooling mechanisms; so children can become overheated when playing or exercising. Children and adolescents often do not think to rest when having fun and may not drink enough fluids when playing, exercising, or participating in sports.
Children who may be especially vulnerable to heat-related illnesses
Children and adolescents with chronic health problems, or those who take certain medicines, may be more susceptible to heat-related illnesses. Children and adolescents who are overweight or wear heavy clothing during exertion, such as marching band or football uniforms, are also more susceptible.