Heat, humidity keeps hold on Eastern US as weekend slogs on
(World News Science)

NEW YORK (AP) - A heat wave will continue to keep much of the Eastern United States in its grip Sunday, while a cold front that could lower temperatures in the middle of the country may be accompanied by thunderstorms that threaten flash floods. The National Weather Service says the `oppressive and dangerous` heat wave will abate by Monday and Tuesday. The agency says a swath of the East Coast, from the Carolinas...