CCTV – A water treaty signed by the U.S. and Mexico nearly 70 years ago calls for both countries to share resources in times of water surplus and shortage, but U.S. officials say Mexico isn’t holding up its side of the bargain.

http://www.cctv-america.com/2014/12/23/us-says-mexico-not-living-up-to-treaty-to-share-water-in-times-of-drought