While many sun worshippers count summer as their favorite time of year, the season comes with a host of health risks.\nMatthew Synan, MD, of Pulmonary Consultants of UPMC, says heat-related conditions, such as heat stroke and heat exhaustion, are two common summertime ailments.\nFor immediate treatment, go to your nearest emergency room or find locations on UPMC CareFinder.\nWhile these conditions are different, they\u2019re often confused. Both conditions are on the spectrum of temperature-related illness, but they differ in severity.\nLearn more about the negative effects of heat on the body.\nWhat Causes Heat Exhaustion?\nHeat exhaustion occurs when you\u2019ve been exposed to extremely high temperatures and is often accompanied by dehydration. Specifically, a person experiences heat exhaustion when the body reaches a temperature of less than or equal to 104 degrees Fahrenheit.\nThere are two types of heat exhaustion. The first is water depletion, resulting in excessive thirst. The second is salt depletion, which can result in nausea and muscle cramps, among other symptoms.\nHeat exhaustion symptoms and signs\n\nDizziness\nMild confusion (which normalizes within 30 minutes of treatment)\nA faster heart rate with normal blood pressure\nMild to moderate\u00a0dehydration.\n\nWhat you should do if you believe you have heat exhaustion\n\nSit down and move to a cooler location\nDrink water\nTry applying cool, wet cloths to your body\nSpray water or fan yourself\n\nWhat Is Heat Stroke?\nHeat stroke occurs when the body reaches a core temperature of more than 105 degrees Fahrenheit. It is more serious than heat exhaustion.\nHeat stroke is a medical emergency that can result in brain and\/or internal organ damage. The condition occurs after prolonged dehydration and exposure to high temperatures. Heat stroke is often a progression from heat exhaustion, when the body\u2019s mechanisms for controlling its temperature fail.\nHeat stroke symptoms and signs\n\nAbnormal mental status (such as delirium, hallucinations, or slurred speech),\nA faster heart rate coupled with low blood pressure\nModerate to severe dehydration\n\nWhat you should do if you believe you are experiencing heat stroke\n\nCall 911 \u2014 heat stroke is a medical emergency\nMove to a cooler location and remove unnecessary clothing\nSpray water or fan to cool body temperature\nDo not drink water\n\nTypes of Heat-Related Illness\nThere are two distinct types of heat stroke and heat exhaustion: classic and exertional.\n\nClassic\u00a0heat stroke and exhaustion can occur without any activity or physical exertion and is more common in individuals age 70 or older, or those who have a chronic medical condition.\nExertional heat stroke and exhaustion occurs as a result of physical activity and is most common in young individuals who engage in heavy exercise during high temperatures such as athletes and military recruits.\n\nIf not quickly treated, both these conditions may result in kidney failure, respiratory failure, liver failure, muscle breakdown, and even death.\nPreventing Heat Stroke and Exhaustion\nWhen the weather is hot, it\u2019s important to take steps to prevent heat-related illness.\nLimit physical activity in extreme temperatures, and head outside only in the evening, when it\u2019s coolest. Wear loose clothing and take frequent breaks.\u00a0Some medications, such as allergy, heart, or psychiatric prescriptions can put you at an increased risk, as these medications may limit the body\u2019s ability to sweat.\n\u201cIf any \u2018woozy\u2019 symptoms are felt \u2014 mainly due to low blood pressure as the capillaries are dilating to let the heat out \u2014 I advise my patients to lay down as soon as safely possible to help restore the most blood flow to the brain,\u201d said Kevin Wong, MD, of West Moreland Family Medicine \u2013 UPMC.\nYou can also try lifting one leg, then the other, to increase blood flow to the heart and brain.\nDr. Wong said you\u2019re more at risk of heat exhaustion if you take anything that dilates your blood vessels and drops your blood pressure, including medications or alcohol.