MD Heat Wave Could Break Temperature Records, Real Feel May Eclipse 110 Degrees

Temperatures could top 100 degrees and break records Tuesday in Maryland. With real-feel temperatures of up to 111 degrees, another extreme heat warning covers most of the state.

Tuesday's expected high at Baltimore/Washington International Thurgood Marshall Airport is 101 degrees. The highest temperature ever recorded on June 24 at BWI Airport was 100 degrees in 2010.

"A strong dome of high pressure in the upper atmosphere will maintain hot & humid conditions across the area," the National Weather Service said on its website. "Additional daily temperature records are possible today for both highs and warm overnight lows."

All of Maryland, except Allegany and Garrett counties, is under an extreme heat warning until 9 p.m. Tuesday. An extreme heat watch will be in effect Wednesday morning through evening.

Highs will remain in the 90s through Thursday. There's a chance of thunderstorms daily from Wednesday through Monday.

"An isolated storm or two cannot be ruled out near the central Blue Ridge," the NWS said on Tuesday. "Otherwise, the better shot for showers and thunderstorms come during the mid to late week period as the ridge weakens and a cold front nears the Mason-Dixon Line."

Friday will offer a slight reprieve with a high of 79, but temperatures will return to the upper 80s and low 90s Saturday through at least Monday.

The heat wave will "envelop 170 million Americans through late June," AccuWeather reported.

AccuWeather Meteorologist Jacob Hinson called it "dangerous heat."

"Vulnerable people, such as the elderly or young children, are most susceptible to heat-related illness," Hinson said. "Caution should be taken if spending any appreciable amount of time outside, such as by staying hydrated with non-alcoholic beverages, taking frequent breaks and seeking shade."

Here is the NWS seven-day forecast at BWI Airport:

Tuesday: Sunny and hot, with a high near 101. Heat index values as high as 110. Calm wind becoming northwest around 5 mph in the afternoon.

Tuesday Night: Mostly clear, with a low around 79. Calm wind.

Wednesday: A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.

Wednesday Night: A chance of showers and thunderstorms before 5am, then a slight chance of showers. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 30%.

Thursday: A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly sunny, with a high near 93. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 70%.

Thursday Night: Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

Friday: A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.

Friday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.

Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 40%.

Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.

Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 50%.

Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.

Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 50%.