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 .
NEW : An Ohio man says he has never seen such winds and damage . Two boys , ages 7 and 2 , are killed while camping at a park in New Jersey . They 're among 13 killed in storms that left millions without power . Cooling stations open up and down the East Coast due to extreme heat .