Our bodies create a tremendous amount of internal heat. We normally cool ourselves by sweating and radiating heat through the skin. Under certain circumstances, such as unusually high temperatures, high humidity or vigorous exercise in hot weather, this natural cooling system may begin to fail, allowing internal heat to build up to dangerous levels. The result may be heat illness, which can be in the form of heat cramps, heat exhaustion or heatstroke.
Heat cramps
“Heat cramps are brief, severe cramps in the muscles of the leg, arm or abdomen that may occur during or after vigorous exercise in extreme heat. They are painful but not serious,” says Virtua Health pediatrician Anthony Napoli, MD. “Children are particularly susceptible to heat cramps when they have not been drinking enough fluids. Most heat cramps do not require special treatment. A cool place, rest and fluids should ease the child’s discomfort. Massaging cramped muscles may also help.”
Heat exhaustion
Heat exhaustion is a more severe heat illness that can occur when a person in a hot climate or environment has not been drinking enough fluids. Symptoms can include dehydration (intense thirst), fatigue, weakness and clammy skin. There also may be headache, nausea and/or vomiting, hyperventilation (rapid breathing), or irritability. If a child shows signs of heat exhaustion, resting in a cool area and drinking fluids are the keys to recovery.
What to do:
Bring the child indoors or into the shade. Loosen or remove clothing. Encourage food and drink. Give child a bath in cool (not cold) water. Call the doctor for further advice. If the child is too exhausted or ill to eat or drink, intravenous fluids may be necessary. “If left untreated, heat exhaustion may escalate into heat stroke, which can be fatal,” warns Dr. Napoli.
Heatstroke
“Heatstroke, the most severe form of heat illness, is a life-threatening emergency. The body loses its ability to regulate its own temperature,” states Dr. Napoli. “Unless you seek prompt medical attention, body temperature can soar to 105 degrees Fahrenheit – or even higher – and lead to shock, which can be fatal.”
Factors that increase the risk for heatstroke include overdressing and extreme physical exertion in hot weather with inadequate fluid intake. Heatstroke can also result when a child is left in, or becomes accidentally trapped in, a car on a hot day. When the outside temperature is 93 degrees Fahrenheit, the temperature inside a car can reach 125 degrees in just 20 minutes, quickly raising a child’s body temperature to dangerous levels.
What to do:
Call for emergency medical help if your child has been outside in the sun exercising for a long time and shows one or more of the following symptoms of heatstroke:
Headache Dizziness or weakness Disorientation, agitation or confusion Sluggishness or fatigue Seizure Hot, dry skin Temperature of 105 degrees Fahrenheit or higher Loss of consciousness “While waiting for help, get the child indoors or into the shade, undress him/her and sponge or douse him/her with cool water,” advises Dr. Napoli. Find more articles on heat illness and summer safety at www.virtua.org/kidshealth.
