 High tides left moderate damage in St. Mary's County, Maryland of about $4.4 million (2006 USD), with the damage to trees and power lines considered worse than the impact in Hurricane Isabel in 2003.In neighboring Charles County, storm surge flooding forced the evacuations of houses along the waterfront.The interaction between Ernesto and a high pressure area over eastern Canada produced high winds, heavy rainfall, tidal flooding, and high waves across the Mid-Atlantic and New England.