It's been an issue for many years.Yes, water is an issue. The Ogallala Aquifer is being depleted in a pretty bad way. Some areas of the Ogallala have already been depleted. The Ogallala is being drawn down by about 2 feet a year, but natural replenishment of the aquifer is only something like 3 inches a year.
Crisis on the High Plains - The Loss of America's Largest Aquifer, the Ogallala