 A dangerous heat and humidity expected around Baltimore, the metro area, for the next couple of days. Excessive heat warning in effect from 11 o'clock this morning until 8 o'clock tonight. Tomorrow, an excessive heat watch in effect until 8 p.m. Locations under today's excessive heat warning include the following. Baltimore City, Baltimore County, Caroline, Cecil, Hartford, Howard, Kent, Queen Anne's, and Talbot Counties, where the heat index could reach 110 degrees.