RT Book, Section A1 Apkon, Michael A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 6722293 T1 Chapter 121. Heat Stress T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=6722293 RD 2024/04/24 AB Hyperthermia is a state in which body core temperature rises as a result of heat generation and absorption exceeding heat loss. Given that body temperature reflects the balance between heat gain and heat loss, hyperthermia is found most frequently under conditions such as exercise in which heat production is increased or in subjects such as infants or patients with dehydration who lack the ability to increase their heat loss in response to environmental heat. Thus individuals who engage in athletic activities and infants are at particular risk for heat-related illness. Heat stress has been recognized as a cause of illness for more than 2000 years. It is responsible for increases in population death rates during hot times of the year in areas exposed to particularly high environmental temperatures,1 and increases morbidity related to other diseases. Heatstroke, the most serious form of heat-related injury, is the second most common cause of athletics-related death after head injury.