Record heat fueling violent storms in central U.S.

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By Matthew Cappucci and Jason Samenow, The Washington Post. 

Excerpt: A sprawling dome of summerlike heat has swelled from Texas to Wisconsin and is poised to shatter records in more than a dozen states. Madison, Wis., Chicago, Des Moines, St. Louis, Kansas, Little Rock and New Orleans could all set record highs above 90 degrees Thursday.…

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