Millions of drinking wells around the world may soon be at risk of running dry. Overpumping, drought and the steady influence of climate change are depleting groundwater resources all over the globe, according to new research. As much as 20% of the world’s groundwater wells may be facing imminent failure, potentially depriving billions of people of fresh water. … Residents of California’s Central Valley are preparing for another arid summer and the rising risk of dry wells, The Fresno Bee reported yesterday. It’s a recurring pattern there.