The worst of the heat will start in the Midwest on Friday before creeping its way east toward the Northeast and Mid-Atlantic by Saturday and Sunday. Heat advisories, watches and warnings have been posted in parts of 18 states from New Mexico to Michigan.
Temperatures of 100 degrees will bake parts of the central and southern Plains into Friday, according to AccuWeather.
The hot weather is courtesy of a strong upper-level ridge of high pressure, sometimes known as a “heat dome,” which will park itself over much of the U.S. by the weekend, according to the Weather Channel.
In urban areas of the major cities, such as Chicago, St. Louis, Detroit and Cincinnati, cooling stations will be needed, AccuWeather warned. The vast expanse of concrete and pavement will give off heat at night and make sleeping difficult without air conditioning.
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