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Sun rising over Chesapeake Bay
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Governor Wes Moore has declared a state of preparedness in Maryland as a dangerous heat wave grips the state, with scorching temperatures expected to continue through Wednesday.

The declaration allows state and local agencies to coordinate emergency resources and preparation ahead of any potential impacts from the extreme heat, according to the Governor’s Office.

On Monday, temperatures soared to nearly 98° at BWI-Marshall Airport and reached a blistering 104° at Baltimore’s Inner Harbor. The National Weather Service forecasts daytime highs in the upper 90s through at least Thursday, with some areas potentially hitting 100°. Heat index values—how hot it feels with humidity—are expected to reach between 105 and 110 degrees, possibly peaking near 115. Overnight lows are also predicted to remain above 80°, offering little relief.

Health officials warn that the intense heat and humidity significantly increase the risk of heat-related illness, particularly for outdoor workers, vulnerable populations, and those engaging in strenuous activity outside.

Staying Safe in the Heat

The Governor’s Office recommends the following precautions:

  • Never leave children, pets, or the elderly in parked vehicles.
  • Stay hydrated, drinking plenty of water and avoiding alcohol, caffeine, and sugary drinks.
  • Limit outdoor activity between 11 a.m. and 3 p.m., when the sun is strongest.
  • Wear light, loose-fitting clothing and check whether any medications may increase your risk of heat-related illness.

Local Response

Cooling centers have been activated in Baltimore City and County, as well as in Howard, Anne Arundel, and Harford Counties. In Baltimore, public pools—such as Patterson Park Pool, which saw over 100 visitors on Monday—have extended hours under a Code Red alert.

Residents can find designated cooling centers by visiting their local jurisdiction websites or by contacting local emergency services. Harford County is also offering cooling relief at library branches during normal hours.