Not surprising that we have so many locations hitting 100 degrees. The latest SPC mesoanalysis has 850 temps of +22C and warming. Might explain the lack of a cu field.
Per NWS:
Baltimore (BWI) has tied its longest streak of days with temps of 101F+ at three (3) days -- previous occurrences 8/26-28/1948 & 7/19-21/1930
Washington DC (DCA) has tied its longest streak of days with temps of 101F+ at three (3) days -- previous occurrences 7/19-21/1930