Across the Corn Belt, heat continues to expand eastward. Later Wednesday, maximum temperatures should reach 100°F or higher in much of the western Corn Belt, extending as far north as South Dakota and southern Minnesota, and east into the mid-Mississippi Valley portions of the eastern Corn Belt. The heat will hasten summer crop maturation, possibly at the expense of yield potential.
On the Plains, a late-season heat wave continues, except near the Canadian border.
