I got this link from Nick Garland who lives in Stevenage, UK. It is a really good article, well worth the time:
Here are his comments: I can see a number of positive feedback loops in play here. Some quotes:
The region is locked in a 19-year-long drought, the most severe in 1,250 years. The alarm is palpable among water managers throughout the Southwest. They see the writing on the wall.
If water levels continue to drop, sinking below 1,050 feet, Hoover Dam will stop generating electricity
However the biggest cloud looming over the Colorado River Basin is whether the region is entering a completely new era, a permanent change as opposed to a temporary one, caused by a planet being rapidly warmed by human activity. “Is this a drought or is this aridification of the Southwest and Colorado River Basin?”
Thanks, Nick. I appreciate it.