A dangerous stretch of extreme heat grips Maryland, breaking records and straining local services.
As June comes to a close, Maryland—along with much of the Midwest and Eastern U.S.—is facing several consecutive days of extreme heat. While isolated days above 100°F aren’t unusual during Maryland summers, it’s rare to see such high temperatures this early in the season and for such an extended stretch. These prolonged heat waves are becoming more frequent, with temperature records being broken year after year.
According to the National Weather Service,
A strong upper-level ridge parked over the eastern half of the country and will continue to generate an extremely dangerous heat wave this week. Extreme HeatRisk impacts will expand from the Midwest into the Mid-Atlantic today. This level of HeatRisk is known for being rare and/or long duration with little to no overnight relief, and affects anyone without effective cooling and/or adequate hydration. High temperatures in the 90s to 100s and lows in the 70s to low 80s will break numerous records over the next several days. Dense urban centers like: Columbus, OH; Washington, DC; and Philadelphia, PA will experience especially significant heat impacts. Heat related illnesses increase significantly during extreme heat. Wear lightweight and loose fitting clothing.
Extreme heat poses serious challenges not only to public health but also to local governments and critical infrastructure. Counties often experience increased demand for emergency services, including medical response and fire protection, during prolonged high-temperature events. Energy systems also face heightened stress. PJM Interconnection, the regional grid operator, recently indicated that in a severe weather scenario, available generation capacity may not meet reserve requirements. While this represents an extreme case, it raises the potential for service disruptions such as brownouts or blackouts.