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

The millions of acres of corn grown in states like Ohio, Illinois and Iowa perspire just like any other plant. A single acre sweats 3,000 to 4,000 gallons of water every day.

See how corn sweat affects humidity and summer heat in states like Ohio. Explore the science behind how cornfields contribute to atmospheric moisture.