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Dangerous heat continues to grab headlines from the South-Central U.S. to the Northeast.
Some 100 million people are under a heat advisory on Wednesday.
Temperatures will be over 100 degrees for many big cities, with plenty of humidity making it feel much worse.
Meanwhile, strong-to-severe thunderstorms will be possible as a cold front slices through the hot, humid air mass over the Great Lakes and Ohio Valley.
More rain is forecast with the possibility of flooding across the Southwest and southern Rockies, as the summer monsoon season continues.