From Chicago to the East Coast, temperatures are soaring in a heat wave that is expected to be "prolonged." NBC's Peter Alexander reports and TODAY's Al Roker gives the forecast.
By Henry Austin, NBC News contributor
Blazing temperatures left thousands of people sweltering without power in New York as forecasters warned Tuesday that the worst might be yet to come across the Northeast.
Weather Channel lead meteorologist Kevin Roth said that humidity combined with hot temperatures would make it feel between 90 degrees and 105 degrees in the Northeast until a cold front brings an end to the heat wave on Friday and Saturday.
"Records may be broken each day," Roth added.?
John Brecher / NBC News
A man pours water on his head to cool off during hot weather in Manhattan on Monday.
With temperatures about 11 degrees above the Big Apple average for this time of year, customers cranked up the air conditioning on Monday, NBC New York reported. ??
This surge in demand left about 1,500 homes in New York City without power, according to utility company Con Edison. Extra crews were put on standby for the duration of the heat wave.
New England's power grid operator told the Associated Press that demand for electricity could close in on a seven-year record people tried to cope. ISO-New England says the record for power use was 28,130 megawatts on Aug. 2, 2006. ISO said Monday that demand for 27,900 megawatts is possible on Thursday.
Health commissioners in Philadelphia urged people to check on their elderly relatives and neighbors. Temperatures in the city could reach up to 103 degrees ? well above the 84 degree average for this time of year. ?
With a heat index near 105 degrees,?a heat advisory was issued for Washington, D.C., the Virginia cities of Arlington, Alexandria and Falls Church from noon until 7 p.m. Tuesday, NBC Washington reported.
Roth blamed the high temperatures on a dome of high pressure sitting in the Ohio Valley.
?There?s a storm in the southern planes and that?s normally where we would see this big high at this time of year,? he said. ?That storm that originated in the Northeast has gone down there and behind it this ridge popped up. For now there?s light winds and nothing really to move it along at the moment, but later this week we will get a cold front move in to sweep that hot air out.?
Relief is on the way, he added, but for much of the country it won?t be until at least Saturday when temperatures begin to drop.
?For next week it looks like it will be closer to average, if not a few degrees below, so it looks a lot more comfortable for next week,? he said.?
Farther to the north and across the interior Northeast, temperatures in the upper 80s and low 90s were expected in Boston and Burlington, Vt., on Tuesday.
Chicago, Detroit and Ohio Valley were likely to see temperatures in the upper 80s and low 90s, according to weather.com.
Meanwhile, Roth warned that "numerous showers and thunderstorms" were likely across Oklahoma and Texas.
"Heavy rain may produce another one to three inches and some flash flooding through Wednesday," he added.
The Associated Press contributed to this report.
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This story was originally published on Tue Jul 16, 2013 6:14 AM EDT
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