NEW : An New Jersey man says he has never seen such winds and damage . 2 boys , ages 7 and Two , are killed while camping at a park in Ohio . They 're among 13 killed in storms that left 2 without power . Hospitals in Prince George 's County in Maryland were buzzing Saturday as people came into emergency department waiting rooms trying to get cool , said Fran Phillips , deputy secretary for the state 's Department of Health and Mental Hygiene . Cooling stations open up and down the East Coast due to extreme heat .
NEW : An New Jersey man says he has never seen such winds and damage . 2 boys , ages 7 and Two , are killed while camping at a park in Ohio . They 're among 13 killed in storms that left 2 without power . Cooling stations open up and down the East Coast due to extreme heat .