While Labor Day typically marks the unofficial end of summer, heat pouring back into the Northeast will actually peak after the holiday weekend.
"Summer is going to dig its heels in across the Northeast for much of the week," stated AccuWeather Meteorologist Brian Thompson, "as it will feel more like late July or early August rather than September."
The same area of high pressure that allowed the holiday weekend to start on a mostly dry and comfortable note will shift offshore, opening the door for heat and humidity to build through the first part of this week.
Labor Day is shaping up to be very warm, but the number of communities cracking the 90-degree mark will be significantly higher Tuesday and Wednesday when compared to Monday.
"AccuWeather RealFeel® Temperatures will be in the 90s in many places thanks to the increasing humidity and the lack of a cooling breeze," continued Thompson.
More typical early September highs range from the 70s in New England to the lower 80s in the mid-Atlantic.
The temperature departure from normal will be so great in some places that record highs will be challenged. This includes in Boston; Providence, Rhode Island; New York City and Albany, New York; and Baltimore.
According to AccuWeather Senior Meteorologist Dave Dombek, "With normal temperatures trending downward quickly this time of the year, the heat may be more extreme when compared to earlier this summer."
Residents with outdoor plans are urged to drink plenty of water, wear light clothing and avoid strenuous activities during the hottest times of the day (the midday and afternoon hours) to prevent suffering from heat exhaustion or stroke. This includes sports players who typically do not have to deal with such summerlike conditions in early September.
Remember to never leave children or pets in a sealed vehicle.
For those looking to beat the heat by heading to lakes and the Atlantic beaches, be sure to use caution as some locations end lifeguarding services after Labor Day.
Spotty, cooling thunderstorms will be largely absent on Labor Day before gradually expanding eastward from the Midwest into the Northeast Tuesday and Wednesday. However, the storminess these days should stop short of reaching the I-95 corridor from Philadelphia to Boston.
"There are signs that the ridge in the jet stream responsible for the warm start to September in the East will finally break down late in the week, which will allow cooler and less humid air to move in for the upcoming weekend," added Thompson.
A slow-moving cold front will sweep away the heat, accompanied by showers and thunderstorms later in the week. Some of the thunderstorms will unleash excessive rainfall.
While the wet weather will disrupt outdoor activities and there can be incidents of flash flooding, lawns and crops will get a welcome soaking where rainfall has been lacking recently.
The United States Drought Monitor reported last Thursday that parts of the Northeast, especially places east of the Appalachians, were abnormally dry or in the midst of a moderate drought.