In wake of a weekend that brought widespread low humidity and comfortable weather to the Ohio Valley and mid-Atlantic, heat and humidity will return in a big way.
"The hottest weather of the year so far will spread from the Ohio Valley to the mid-Atlantic states Tuesday into Wednesday," AccuWeather Senior Meteorologist Brett Anderson said.
Columbus, Ohio, Pittsburgh, Pennsylvania and Philadelphia will be among a host of other cities that will hit 90 for the first time this year. New York City will make a run for 90, but may fall just shy.
"The worst of the heat will be concentrated along the I-95 corridor from Philadelphia to the Carolinas," Anderson said.
Washington, D.C., is forecast to have at least three days in a row with temperatures reaching 90 or higher. When this occurs in the northern states, it is considered to be a heat wave. High temperatures may also challenge record highs on one or more dates this week in the nation's capital.
Thermometers will only show one side of the heat. High humidity will pair up with the heat to create dangerously hot conditions.
"AccuWeather RealFeel® temperatures could approach 110 F in the corridor of worst heat on Wednesday," said Anderson.
In this extreme heat, limit your outdoor activities and seek shade or air conditioning when possible. Keep hydrated by drinking plenty of water.
Relief will also come from some cooling showers and thunderstorms which will be most prevalent during the afternoons and evenings this week.
A strengthening high pressure system across the Southeast will be responsible for the hot weather. The high will send this heat, that is more typical across the south, into the northern regions.
The worst of the heat will slowly begin to concentrate toward the Deep South later this week, from Louisiana to Georgia as the high weakens and settles farther south.
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