“Heat islands” around urban areas form as vegetation is replaced by asphalt and concrete for roads, buildings and other infrastructure. These hard, dark surfaces absorb rather than reflect incoming heat from the sun, causing overall urban temperatures to rise. During hot weather spells, the heat island effect can raise urban temperatures by two to ten degrees Fahrenheit over those in nearby rural areas.
Viewer Tip: Older individuals are especially vulnerable to heat-related illnesses. The body’s cooling mechanism doesn’t work as efficiently as we age and living alone or being confined to a bed can further increase vulnerability to high temperatures. Keep these tips in mind to help older family members and friends stay healthy:
- Seek out A/C – Just a few hours per day in an air-conditioned building can reduce risk of illness. If your home does not have A/C, visit a senior center, movie theater, library, mall or designated community cooling center. A fan may provide some relief, but when temperatures reach the high 90′s, electric fans do not prevent heat-related illness.
- Dress the Part – Wear light-weight, loose clothing that is light in color. Drink plenty of fluids and avoid drinks with caffeine, alcohol or lots of sugar, which can cause dehydration.
- Check Up – If you have a family member, friend or neighbor who is at risk, visit them regularly. If you see signs of heat-related illness – confusion, hot and dry skin, hallucinations, or aggression – seek help immediately.
Season: Summer
(Sources: Weather and Health, an online course developed by NEEF and the COMET Program. Access it free online: www.meted.ucar.edu/bmet_training.php; US EPA. October 2007. “It’s Too Darn Hot – Planning for Excessive Heat Events.” Publication number: EPA 100-F-07-025, www.epa.gov/aging)
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