[butlerweave]

It’s not Climate you fools , you’ve been watches too many horrible disaster movies ,LOL

[Thud]

Actually it is due to climate change (drought), but a regional one confined to the American Southwest (Arizona, California, Nevada and Colorado). It's been traced back thousands of years and may have begun after the Younger Dryas period.

The 20th Century was the wettest century in the Southwest in the past 2000 years. The actual average over the past 3000 years has been 2/3 that and a real Southwest drought sees only 1/3 the average precipitation of the 20th Century. Plus there are Southwest mega-droughts lasting hundreds of years with 1/3 of the 20th Century's precipitation for the whole time.

See _The West Without Water_.