Excessive heat warning in effect Saturday

An excessive heat warning is in effect for central and southern Maryland and part of the Eastern Shore from 11 a.m. to 10 p.m. Saturday.

High temperatures could reach a record-breaking 104 degrees, according to the National Weather Service, with heat index values up to 110 degrees. A high of 101 degrees from a heat wave in 2010 is the record for BWI Marshall Airport on July 7.

That means a high risk of heat exhaustion or other heat-related illnesses, the weather service warns. That is particularly true for the several thousand Baltimore Gas and Electric Co. customers still without electricity.

There is also a risk of severe weather. The Storm Prediction Center in Norman, Okla., is calling for a 15 percent chance of severe storms forming in central and western Maryland.

The heat could be a crescendo for Mother Nature, after what has so far been a 10-day stretch with highs in the 90s and 100s and also included the powerful derecho storm July 29. A stretch with highs in the upper 80s is forecast to begin Monday.

Officials with the Maryland Emergency Management Agency encourage anybody in Maryland who needs transportation to a government-run cooling center to dial 211.

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

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