Arizona’s Recent Six-Year Dry Spell Was The Worst In Nearly 700 Years

The six-year dry spell in Arizona that ended earlier this year was likely an unprecedented event not seen in the past 675 years. The interesting and spooky factoid comes from studies of tree-ring data that were used to estimate flows from the rivers that provide water to metro Phoenix and other parts of central Arizona. As you might think, the freaky stretch of poor river flow doesn’t bode well for the state’s future.