Extreme Heat Warning Continues: Heat Index Climbs To 111 In NoVA

The hottest temperatures so far this week are arriving Tuesday, as an extreme heat warning continues in Northern Virginia.

The National Weather Service's extreme heat warning is in effect from 11 a.m. to 9 p.m. Tuesday. Forecasters expect "dangerously hot conditions" and a real-feel heat index up to 111 due to the high temperatures and humidity.

An extreme heat watch will take effect Wednesday morning through the evening, with a heat index up to 110 degrees expected.

Areas under the extreme heat warning include Fairfax County, Arlington County, Falls Church, Alexandria, Stafford County, Spotsylvania County, Fredericksburg, eastern and western Loudoun County, northwest, central and southeast Prince William County, Manassas, Manassas Park and other surrounding areas.

The Washington Post's Capital Weather Gang says temperatures could climb even faster on Tuesday than Monday. Forecasters say "afternoon heat could be the worst of [the] week with highs near 100 and heat indexes reaching near 110." Temperatures were expected to hit the 90s by the mid-morning and get close to 100 in the afternoon. With few clouds and winds, the Capital Weather Gang says there will "no relief" from the scorching heat.

AccuWeather's meteorologists believe dangerous heat will ease on Tuesday night in New England but continue into Thursday in D.C. and other parts of the Mid-Atlantic.

"This is a strong and dangerous heat wave to kick off the summer," said AccuWeather Chief Meteorologist Jonathan Porter. "Overnight minimum temperatures above 80 degrees in urban areas across the Northeast is extremely concerning. There will be little relief from the heat at night, raising the risk of health impacts for people without air conditioning and for those vulnerable to heat-related illnesses."

According to the National Weather Service, chances of heat-related illnesses increase during extreme heat and high humidity. Heat stroke with symptoms like confusion, dizziness and becoming unconscious is considered an emergency and should be directed to 911. The office encourages drinking plentiful fluids, staying in air conditioning and out of the sun, and checking on relatives and neighbors.

Here is the National Weather Service forecast for the days ahead:

Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 110. At night, mostly clear, with a low around 76.

Wednesday: A chance of showers and thunderstorms after 2 p.m. Sunny and hot, with a high near 97. Heat index values as high as 109. Chance of precipitation is 30 percent. At night, a chance of showers and thunderstorms before 2 a.m. Partly cloudy, with a low around 75. The chance of precipitation is 40 percent at night.

Thursday: A slight chance of showers before 2 p.m., then showers likely and possibly a thunderstorm between 2 p.m. and 5 p.m., then showers and thunderstorms likely after 5 p.m. Mostly sunny, with a high near 94. Chance of precipitation is 70 percent. At night, showers and thunderstorms likely before 8 p.m., then showers likely and possibly a thunderstorm between 8 p.m. and 2 a.m., then a slight chance of showers after 2 a.m. Mostly cloudy, with a low around 71. Chance of precipitation is 60 percent.

Friday: A chance of showers and thunderstorms after 2 p.m. Mostly cloudy, with a high near 82. Chance of precipitation is 50 percent. At night, a chance of showers and thunderstorms before 2 a.m. Mostly cloudy, with a low around 71. Chance of precipitation is 40 percent.

Saturday: A chance of showers and thunderstorms after 2 p.m. Partly sunny, with a high near 88. Chance of precipitation is 50 percent. At night, a chance of showers and thunderstorms before 2 a.m. Mostly cloudy, with a low around 72. Chance of precipitation is 40 percent.

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