A phenomenon called "corn sweat" could exacerbate the impacts of the extreme heat blanketing a large portion of the U.S., according to experts.

Minnesota and Iowa are known for their sultry summer days, with enough heat and humidity to go around. But why does it get so humid sometimes across the area? The answer is corn sweat.

As temperatures heat up across the Midwest, a phenomenon known as ‘corn sweat’ can make the heat feel even worse. Through a process called evapotranspiration, the leaves of the plant release moisture back into the atmosphere.