The remnants of Dennis tracked across Maryland between September 4 and September 6, producing heavy rainfall in central portions of the state and tidal flooding along the western shoreline of the Chesapeake Bay. Rainfall totals include at Clarksburg, at Glenmont, and at Gaithersburg. Winds in the state gusted to , causing downed tree limbs and scattered power outages. Associated lightning in Allegany County struck two main power poles. The incident forced the closure of Interstate 68 and left 4,700 customers without power. Tides generally ran above normal along the coast; coastal flooding was reported at several locations. Two days of heavy rain swelled Jones Falls Creek, which swept away a 13-year-old boy. After an hour, he was rescued from a pile of debris and treated for hypothermia. Street flooding of up to in depth was reported. In Baltimore, persistent winds pushed water over a seawall at Inner Harbor.