Heat stroke, also known as sun stroke, is a severe heat illness, defined as hyperthermia with a body temperature greater than 40.6 °C (105.1 °F) because of environmental heat exposure with lack of thermoregulation. This is distinct from a fever, where there is a physiological increase in the temperature set point of the body. The term “stroke” in “heat stroke” is a misnomer in that it does not involve a blockage or hemorrhage of blood flow to the brain. Preventive measures include drinking plenty of cool liquids and avoiding excessive heat and humidity, especially in unventilated spaces, such as parked cars, that can overheat quickly. Treatment requires rapid physical cooling of the body.
Warm stroke happens when thermoregulation is overpowered by a blend of extreme metabolic generation of warmth (effort), exorbitant ecological warmth, and inadequate or weakened warmth misfortune, bringing about a strangely high body temperature. Substances that hinder cooling and cause drying out, for example, alcohol, stimulants, prescriptions, and age-related physiological changes incline to purported “great” or non-exertion warm stroke (NEHS), regularly in elderly and weak people in summer circumstances with inadequate ventilation. Exceptional warm stroke (EHS) can occur in youngsters without medical issues or prescriptions – frequently in competitors, open air workers, or military staff occupied with strenuous hot-climate action or in guaranteed specialists on call wearing overwhelming individual defensive gear. In conditions that are hot as well as sticky, perceive that moistness lessens how much the body can cool itself by sweat and dissipation. For people and other warm-blooded creatures, over the top body temperature can disturb chemicals controlling biochemical responses that are basic for cell breath and the working of significant organs.
The risk of heat stroke can be reduced by observing precautions to avoid overheating and dehydration. Light, loose-fitting clothes will allow perspiration to evaporate and cool the body. Wide-brimmed hats in light colors help prevent the sun from warming the head and neck. Vents on a hat will help cool the head, as will sweatbands wetted with cool water. Strenuous exercise should be avoided during daylight hours in hot weather, as should remain in confined spaces (such as automobiles) without air-conditioning or adequate ventilation.
In hot weather, people need to drink plenty of cool liquids to replace fluids lost from sweating. Thirst is not a reliable sign that a person needs fluids. A better indicator is the color of urine. A dark yellow color may indicate dehydration. The Occupational Safety and Health Administration in the United States publishes a QuickCard with a checklist designed to help protect from heat stress,
Block out direct sun and other heat sources.
Drink fluids often, and before you are thirsty.
Wear lightweight, light-colored, loose-fitting clothes.
Avoid beverages containing alcohol or caffeine