Corn sweat is an agricultural phenomenon that makes humidity during a heat wave even worse, especially in states like Illinois where it's a major cash crop.

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

As Ellen Bacca, chief meteorologist at News 2’s sister station, WOOD, explained, corn and crops “sweat” just like humans when they become hot. Unlike humans, plants bring water from their roots and release it into the air in a process known as evapotranspiration.