More than 87 million people from the Upper Midwest to the mid-Atlantic will be at risk of severe weather on Thursday.

A weeklong severe weather threat continues on Thursday as millions of people in major Midwest cities like Chicago and ...

Chicago is bracing for powerful storms that could pack very large hail, hurricane-force wind gusts and strong tornadoes.

The Atlantic Ocean has a toxic seaweed problem.Floating in brown islands of algae, this year’s sargassum bloom has already ...

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