The New NASA study re Western water issues in the U.S.. Must read, if in West or the Great Lakes watershed.
http://onlinelibrary.wiley.com/doi/10.1002/2014GL061055/pdf
A related article, from 7 years ago...
http://www.thestar.com/news/2007/07/22/could_climate_change_herald_mass_migration.html
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