Heat relief to come to Boston, NYC, DC by midweek

The I-95 corridor of the Northeast and mid-Atlantic will have to deal with more sizzling heat to start the new week, but extended relief will come by midweek.

In the wake of thunderstorms bringing the weekend to an end across the Northeast, a warm west wind will once again boost temperatures along the I-95 corridor on Monday.

Temperatures will soar into the 90s northward to Portsmouth, New Hampshire, causing Monday to be the hottest day so far this year there, in Boston and the other I-95 cities of central and southern New England.

Even temperatures in New York City will rival Sunday's high for the highest yet in 2015.

High humidity will once again send AccuWeather RealFeel® temperatures dangerously past the triple-digit mark in Washington, D.C., Philadelphia and New York City.

Residents and visitors are urged to drink plenty of water, stay in cool locations and avoid strenuous activities, especially during the midday and afternoon hours.

"It is very easy to be overcome by the heat this time of the year," stated AccuWeather Senior Meteorologist Alex Sosnowski. "If you must work outdoors, be sure to take frequent breaks and increase your intake of water and electrolyte balancing fluids."

See photos from the heatwave:

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Across New England, temperatures will be soaring on Monday but humidity will be lowering.

Temperatures will drop a few for Tuesday as a cold front approaches and leads to more clouds, as well as spotty showers and thunderstorms in the mid-Atlantic and interior New England. Humidity will remain uncomfortable for most.

True relief from the heat will come after that front swings through by midweek.

"Some places are experiencing their hottest conditions of 2015 from the weekend into early this week, so the sharp frontal passage forecast to occur on Tuesday will bring welcomed relief," stated AccuWeather Meteorologist Ben Noll.

While the threat will be monitored, widespread severe weather is not expected to accompany Tuesday's cold front.

"The change in the weather will be quite noticeable on Wednesday across much of the Northeast as humidity lessens considerably, though a shower or two cannot be ruled out in northern New England," continued Noll.

High temperatures on Wednesday will also be back to more typical mid-July highs. Residents, especially in New England, may opt to give their air conditioners and fans a break.

It will actually be several days before those air conditioners and fans are needed again, according to Noll.

"The break from the excessive heat and humidity will probably linger into next weekend before another frontal boundary approaches," he stated.