searing 11-day heat wave. the images of those who have to toil in the heat. a pond that got so hot, fish died. and the millions of americans who look for some way to stay cool. and staying cool is nearly impossible for 4 million americans who lost power. some for a week after those massive thunderstorms. these nasa images show how the lights went out. heat kills more americans than floods, tornados and hurricanes combined. and so many days, so hot, has buckled our roads, bent rails, derailing trains, and actually melted asphalt. those tires of that jet at washington's reagan airport sinking into ruts. the misery is ending. david kerley, abc news, washington. >> the numbers say it here, folks, more than 3,400 temperature records have been shattered in the u.s. the past week from the 1st of july through the 7th. hard hit cities, st. louis, hard hit. chicago hard hit. rough couple of days, almost two weeks from this. >> 50 deaths the past week