What: Heat index values up to 105 expected, up to 107 degrees closer to the Chesapeake Bay.
Where: In Maryland, Anne Arundel, Prince Georges, Cecil, Southeast Harford, Southern Baltimore, Calvert, Charles, and St. Marys Counties. In Virginia, King George County.
When: From 1 PM to 7 PM EDT Tuesday.
Impacts: Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.