The heat of summer can be dangerous -- especially for older adults.
The National Institute on Aging says certain people may be more at risk for heat stroke and heat exhaustion than others.
They include the elderly, people with chronic medical conditions, poor circulation and those on salt-restricted diets. Some medications may also reduce a person's ability to sweat.
Symptoms of a heat-related illness include rapid pulse, confusion, staggering, lack of sweat and feeling faint.