Effects of Hurricane Sandy in Maryland and Washington, D.C. fatalities. As of November 3, Somerset County had an initial damage estimate of $40 million. Effects of Hurricane Sandy in Maryland and Washington, D.C. The effects of Hurricane Sandy in Maryland and Washington, D.C. included tropical storm force sustained winds with isolated gusts to hurricane force, plus significant mountain snow and coastal flooding. On October 26, Washington, D.C. Mayor Vincent Gray declared a state of emergency. That same day the governors of Pennsylvania, Maryland, and Virginia also declared states of emergency in preparation of the approaching storm. The United States Office of Personnel Management announced federal offices in the Washington,
Montgomery County, Maryland Montgomery County, Maryland Montgomery County is the most populous county in the U.S. state of Maryland, located adjacent to Washington, D.C. As of the 2010 census, the county's population was 971,777, increasing by 9.0% to an estimated 1,058,810 in 2017. The county seat and largest municipality is Rockville, although the census-designated place of Germantown is the most populous place. Montgomery County is included in the Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Statistical Area, which in turn forms part of the Baltimore–Washington Combined Statistical Area. Most of the county's residents live in unincorporated locales, of which the most built up are Silver Spring and