IE 11 is not supported. For an optimal experience visit our site on another browser.
We apologize, this video has expired.

    Onslaught of seaweed affecting US beaches, could pose health risks

    Experts say an invasion of sargassum seaweed, due to changes in weather conditions and the ocean’s chemistry, is making some U.S. beaches a serious mess. And the problem is only getting worse. NBC’s Kristen Dahlgren reports for TODAY.