http://www.usatoday.com/story/news/environment/2015/12/10/pumped-beyond-limits-many-us-aquifers-decline/76570380/
Water Synthesis Report
Water Study 2014
Yield and Demand Study
Slate – United States of MegaDrought
Washington Post – MegaDrought Rapidly Approaching
Huffington Post – MegaDroughts Coming Later This Century
EarthSky.org – High Risk for MegaDroughts
Microcap Observer – Worst Drought In History