An OhioHealth billboard was mangled from Friday afternoon's severe storm, June 29, 2012. A wave of violent storms sweeping through the mid-Atlantic following a day of record-setting heat in Washington, D.C., has knocked out power to nearly 2 million people. The storms converged Friday night on Washington, D.C., Maryland, Virginia and West Virginia. West Virginia Gov. Earl Ray Tomblin declared a state of emergency after more than 500,000 customers in 27 counties were left without electricity.