The National Weather Service has issued a heat advisory for central Maryland through Wednesday night.

The advisory covers all of the Baltimore area as well as southern Maryland, the Washington, D.C., area and Frederick County. It extends through 8 p.m. Wednesday.

It warns of heat index values between 100 and 105 degrees, putting sensitive populations at risk for heat-related illnesses. The latest forecast from the weather service calls for highs of 98 degrees Wednesday and 100 degrees Thursday, with heat indices up to 102 degrees Wednesday and 105 degrees Thursday.

To cope with the heat, the weather service encourages residents to:

  • Drink plenty of fluids,
  • Stay in air-conditioned rooms if possible,
  • Stay out of the sun,
  • Check on neighbors and relatives,
  • Reschedule strenuous activities to early morning or late evening,
  • Wear light-colored, loose-fitting clothing, and,
  • During outdoor work, take frequent rest breaks in air conditioning or under shade.

Have a weather question? E-mail me at sdance@baltsun.com or tweet to @MdWeather.