Heat Stoke Quick Overview
- Heat stroke is a condition where the
body's cooling mechanisms are overcome by heat resulting in a high core heat
usually above 104 F or 40 C in adults, and 105 F or 40.5 C in children; and
accompanied by mental status changes; heat stoke is a medical emergency.
- Heat stroke is caused by a failure of
the body's cooling mechanisms (sweating and/or evaporative cooling, for example)
when exposed to heat.
- Heat stroke symptoms are mainly increased body core temperature (see
mental status changes.
- Heat stroke is diagnosed by the
history, physical exam, and measurement of body core temperature.
- Treatment of heat stroke is immediate
cooling of the body by
- placing the person in shade or an air conditioned room,
and by covering the person with cool evaporative mists or wet sheets with fans
next to the person to increase evaporative cooling;
- placing ice packs to the groin, armpits,
neck, and head have also been recommended.
- Recovery time for heat stroke is
variable; initial recovery may be done with 1-2 days in the hospital; complete
recovery may take about 2 months to a year.
- Complications of heat stroke increase
the longer it takes to begin treatment; complications can include
- internal organ
- fetal harm or death in
pregnant women, and
- death of the
- Heat stroke can be prevented by
- drinking fluids,
- limiting exposure to heat,
- wearing clothing that allows
evaporative cooling, and
- recognizing the early warning signs of
heat cramps and
heat exhaustion and responding to those symptoms with treatment (cooling).
- Do not leave infants, children, or pets in
vehicles, and do not leave vehicles unlocked so children can get in them
unattended to prevent deaths from heat stroke.
Heat Stroke Definition
Heat stroke is an emergency condition where the body's core temperature is markedly elevated (depending on
who provides the definition, about 104 F [40 C] or above in adults and 105 F or
40.5 C in children) after being exposed to high environmental temperatures combined with neurologic symptoms and loss of body thermal auto regulation (ability of the brain to control the body temperature).
The elderly, pregnant females, and young children are at higher risk for heat stroke;
their bodies do not cool as well as adults with no health problems). Some health-care professionals further subdivide heat strokes into exertional and non-exertional, but both have similar symptoms and treatments. Heat stroke has also been termed sunstroke and hyperthermia; heat stroke is a medical emergency.
Animals (dogs and cats, for example) can suffer heat stroke; symptoms of excessive panting and lethargy or unresponsiveness are usually diagnostic. The animal's Vet should be notified immediately; the treatments and outcomes are similar to those described below for humans.
Medically Reviewed by a Doctor on 6/19/2015
Must Read Articles Related to Heat Stroke
Dehydration in Adults
Dehydration occurs when the loss of body fluids (mostly water), exceeds the amount that is taken in. Causes of dehydration include fever, vomiting, diarrhea, di...learn more >>
Dehydration in Children
Dehydration in children can result from not drinking enough liquids, vomiting, diarrhea, or combination of these conditions. Causes of dehydration in children i...learn more >>
Heat cramps occur when a person is working or exercising in a hot environment. The cause of heat cramps is not well known, however, those at risk are infants an...learn more >>
Patient Comments & Reviews
The eMedicineHealth doctors ask about Heat Stroke: