Right now, there is one burning question on your mind, and I know it’s “What the heck is corn sweat?” The week’s extreme heat wave is blistering the middle section of the United States, where excess moisture from corn fields will evaporate and add an unwanted boost of humidity (called ‘corn sweat’) to the already uncomfortable levels. With temperatures expected to rise up to 20 degrees Fahrenheit above average in some places, meteorology experts say the phenomenon will happen more often as global warming worsens