...A FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR NORTHWESTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND AND SOUTHEASTERN FREDERICK COUNTIES IN NORTH CENTRAL MARYLAND... At 546 PM EDT, local law enforcement officials reported flooding with road closures in southern Frederick County and northwestern Montgomery County. Up to two inches of rain have already fallen. Most of the heavy rain has ended, except near and south of Interstate 270 in Montgomery County. The flood threat will continue. Some locations that may experience flooding include... Germantown, Frederick, Rockville, Gaithersburg, Damascus, Poolesville, Harry Grove Stadium, Montgomery Village, North Potomac, Ballenger Creek, Redland, Mount Airy, Walkersville, New Market, Clover Hill, Discovery-Spring Garden, Boyds, Green Valley, Linganore-Bartonsville and Clarksburg. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles. By The National Weather Serv