The deadly infection has been historically rare, but as climate change heats up waters and worsens flooding, research shows cases could become more common.

A man in Missouri contracted a rare brain-eating amoeba, and officials believe he likely got it while water skiing at the Lake of the Ozarks.

The amoeba is a single-celled organism that lives in hot springs, lakes and other warm freshwater bodies. The Missouri health department says this is only the state's third case on record, but infections are nearly always fatal.