Dr. Thomas James, who practices family medicine at Gottlieb Memorial Hospital, part of Loyola University Health System near Chicago, says it's important to recognize the warning signals of heat exhaustion -- a common heat-related ailment that occurs during hot weather.
"Signs of heat exhaustion include being sweaty, weak, tired or even giddy, nauseous, high body temperature and pale -- sometimes flushed -- clammy skin," James says in a statement.
James recommends treating heat exhaustion by resting in a cool place and drinking an electrolyte solution such as a non-caffeinated sports drink. In hot temperatures avoid drinking caffeinated beverages.
"In severe cases involving vomiting or fainting, see your physician or go immediately to the emergency department at a hospital," James adds.
Heat stroke is caused when sweating stops and the body cannot get rid of excess heat. Symptoms of heat stroke include: mental confusion, fainting or seizures; body temperature of 106 degrees Fahrenheit or higher and hot, dry skin usually red or blueish in color.
"If heat stroke is suspected, call 9-1-1 immediately for an ambulance, then move the person to a cool area and soak with cool water," James says. "Fan the person vigorously to increase cooling."