Baltimore City Department of Public Works (DPW) Acting Director Matthew W. Garbark asks residents to prepare now for the heavy rains and potential flooding associated with Tropical Storm Isaias that is expected to hit the Baltimore area early Tuesday, Aug. 4. The National Weather Service (NWS) has reported that a Tropical Storm Warning is in effect for much of central and southern Maryland. Heavy rain, flooding, wind damage, and tidal flooding are all threats to the area, according to the NWS report.