Hot summer weather can pose special health risks to older adults. The National Institute on Aging (NIA), part of the National Institutes of Health, has some advice for helping older people avoid heat-related illnesses, known as hyperthermia.
Hyperthermia is an abnormally high body temperature caused by a failure of the heat-regulating mechanisms of the body to deal with the heat coming from the environment. Heat fatigue, heat syncope (sudden dizziness after prolonged exposure to the heat), heat cramps, heat exhaustion and heat stroke are commonly known forms of hyperthermia. Risk for these conditions can increase with the combination of outside temperature, general health and individual lifestyle.
Lifestyle factors can include not drinking enough fluids, living in housing without air conditioning, lack of mobility and access to transportation, overdressing, visiting overcrowded places and not understanding how to respond to hot weather conditions. Older people, particularly those with chronic medical conditions, should stay indoors on hot and humid days, especially when an air pollution alert is in effect. People without air conditioners should go to places such as senior centers, shopping malls, movie theaters or libraries. Cooling centers, which may be set up by local public health agencies, religious groups and social service organizations in many communities, are another option.
Health-related factors that may increase risk include:
Heat stroke is a life-threatening form of hyperthermia. It occurs when the body is overwhelmed by heat and unable to control its temperature. Someone with a body temperature above 104 degrees Fahrenheit is likely suffering from heat stroke and may have symptoms of confusion, combativeness, strong rapid pulse, lack of sweating, dry flushed skin, faintness, staggering, possible delirium or coma. Seek immediate emergency medical attention for a person with any of these symptoms, especially an older adult.
If you suspect that someone is suffering from a heat-related illness:
For a free copy of the NIA’s AgePage on hyperthermia in English or in Spanish, contact the NIA Information Center at 1-800-222-2225 or go to www.nia.nih.gov/health/publication/hyperthermia-too-hot-your-health  or www.nia.nih.gov/espanol/publicaciones/hipertermia  for the Spanish-language version.
The NIA leads the federal effort supporting and conducting research on aging and the medical, social and behavioral issues of older people. For more information on research and the aging, go to www.nia.nih.gov .
The NIH—The Nation’s Medical Research Agency—includes 27 institutes and centers and is a component of the U.S. Department of Health and Human Services. It is the primary federal agency for conducting and supporting basic, clinical and translational medical research, and it investigates the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit www.nih.gov .