"The Upper Division states would almost certainly say 'hell no!' The Lower Basin States would then go to court to force the Upper Division states to ... deliver more water," says one expert. Another says that would be akin to "dropping a bomb" into the process.
The federal government released five alternatives for managing a drier Colorado River in an effort to come up with a long-term strategy for ke…
For Star subscribers: Warming temperatures, not declining precipitation, have by far been the biggest triggers of the drought that has overpowered the Western climate since 2000, a new study finds.
The Democratic candidates for Arizona Corporation Commission made climate change an issue, but it did them no good in this year's election.
Arizona is Mexico’s No. 1 trading partner and vice versa. The same goes for the U.S. as a whole — it’s Mexico’s top trading partner and Mexico…
But two of three Democratic candidates for the three ACC seats being contested say they're not ready to concede because more than 900,000 votes are still uncounted.
Three Republican candidates including the lone incumbent on the ballot were running narrowly ahead of three Democratic contenders in early ret…
Tucson baked through an almost endlessly hot October, with hot days averaging more than eight degrees above normal and capping a five-month ru…
Electricity rate increases for two big utilities including Tucson Electric Power accelerated in recent years, intensifying debate among Arizona Corporation Commission candidates over whether the commission is too cozy with utilities.