On top of a drought, California has just been told its troubles could actually get worse. 

According to Reveal from The Center for Investigative Reporting, all the groundwater pumping being done to stave off effects of the drought is making the ground sink at alarming rates. If this becomes widespread, the sinking could threaten the state's infrastructure.

Nathan Halvorsen wrote all about it, and he joined the show to explain more.

Listen to the full interview by clicking the blue player above.