I spent a few years in Arizona doing research for the aerospace industry. During my time off I went on day trips to Native American sites. Very cool!
After doing research on why natives left the area about 700 years ago, it was drought. Not just drought, but a mega drought.
There's a pattern of mega droughts repeating in the SW and west coast. A mega drought can last decades/centuries.
Proceed with caution. It seems they are sudden and persistent.
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