Washington, D.C. – A heat wave gripping the Mid-Atlantic will push heat index values as high as 109 degrees through Wednesday, with a Heat Advisory in effect from noon to 8 p.m. Sunday across parts of central Virginia. Afternoon storms could also bring damaging winds and isolated flash flooding.
According to the National Weather Service, the advisory includes the Virginia Piedmont and foothills, where oppressive humidity will combine with triple-digit heat to create dangerous outdoor conditions. Thunderstorms may erupt Sunday afternoon and evening, with spot flooding possible in urban and low-lying areas.
In Maryland, cities like Frederick and Hagerstown could see heat index readings over 105 by midweek, while areas west of the Blue Ridge — including Winchester, Martinsburg, and western Loudoun County — are likely to feel values between 100 and 104. The Allegheny Front, stretching across western Maryland and eastern West Virginia, may also see localized flash flooding Sunday before high heat takes over the coming days.
Residents are urged to limit time outdoors, stay hydrated, and check on vulnerable neighbors. If thunder roars, go indoors — lightning will accompany some storms.
This prolonged heat is expected to peak Tuesday and Wednesday. Additional advisories are likely, and updated alerts may be issued each morning.
