 Dangerous heat, high humidity expected in Baltimore and the metro area. Excessive heat warning will be in effect from 11 o'clock this morning until 8 o'clock tonight. Tomorrow, there will be an excessive heat watch in effect until 8 p.m. Locations under the day's excessive heat warning include Baltimore City, Baltimore County, Caroline, Cecil, Hartford, Howard, Kent, Queen Anne's, and Talbot Counties, where the heat index could reach 110 degrees.