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.
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 email@example.com or tweet to @MdWeather.