While the heat wave and virtual sauna over the Northeast and Midwest has broken few records, multiple days and nights of high humidity and light winds with the event are leaving an impression.
For many locations, Thursday was day five of the heat wave, which began last weekend. And in some areas there are a couple more days of sweltering to go.
"The duration of the heat index being 97 to over 100 degrees has diminished the population's ability to respond to the heat," Dr. Kevin Baumlin, associate professor and vice chair for Clinical, Operations, Quality and Finance in the Department of Emergency Medicine at the Ichan School of Medicine, said. "We urge people to drink lots of fluids and go to air conditioning if possible."
Mostly older people over the age of 65 are being seen for heat-related illnesses in the emergency department at Mount Sinai Medical Center in New York City, Baumlin said. Twelve patients were treated Tuesday and Wednesday.
Patients with heat illnesses are presenting symptoms of weakness, dizziness, dehydration and nausea, Baumlin said.
Miguel Torres, 77, rides his electric wheelchair near a fountain at Pier A Park while escaping his hot apartment, Wednesday, July 17, 2013, in Hoboken, N.J. (AP Photo/Julio Cortez)
"Several older people in our geriatric emergency department have shown signs of minor confusion," he said.
The heat wave is hitting around what is typically the hottest part of the summer, when the days are long, the sun is intense and the nights are short. (On Thursday, Alaska was the only state that did not reach 90 degrees).
With limited time to cool down at night, temperatures will get a jumpstart during the midday.
As anticipated by AccuWeather.com meteorologists, record high temperatures have been scarce, while the nights have been especially rough for those without air conditioning, especially in the major cities.
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During the overnight hours Thursday, temperatures did not drop below 80 degrees in New York City, Philadelphia, Baltimore, Washington, D.C., and in Milwaukee and Madison, Wis. In Traverse City, Mich., the overnight low Thursday was 82 degrees. For Washington, D.C., temperatures have failed to drop below 80 degrees for four nights in a row.
During the day, the combination of the heat, high humidity, light winds and intense sunshine pushed AccuWeather.com RealFeel® temperatures to well beyond 100 degrees and even past 110 in some locations.
The table below shows RealFeel, actual high and normal high temperatures for the heat wave Sunday, July 14, through 9:00 a.m. EDT Friday, July 19, 2013.
The Alaskan wood frog, which freezes itself during the harsh winter months, can remain in an extreme frozen state far longer than researchers originally thought.
An area of low pressure will bring a threat of heavy rain and flooding to parts of southern Europe through the middle of the week.
A cold front swinging into the Northeast will bring the threat of severe weather to part of the region on Tuesday afternoon.
The late-season swelter will continue along much of the Atlantic Seaboard through the week as tens of millions head back to school and work.
Tropical Storm Dolly has formed in the southwestern Gulf of Mexico's Bay of Campeche and will continue its northwest path into northeastern Mexico.
A second volcanic eruption occurred on Sunday morning in Iceland in the same area that had one on Friday.
Matecumbe Key, FL (1935)
Labor Day Hurricane hit Florida. Pressure at Matecumbe Key dipped to 26.35"/892.3 mb. Most intense hurricane ever to hit the U.S. with 200-mph wind. Tide of 15 feet; 408 dead.
Mecca, CA (1950)
126 degrees - highest ever for U.S. in Sept.
East Coast (1775)