Contreras Fire burns more than 18,000 acres
Fire managers say the fire is more than 40% contained.
Under federal pressure, Colorado River water managers face unprecedented call for conservation
States have 60 days to craft a deal.
Northern Arizona watches winds as Western wildfires blaze
Three fires are burning near Flagstaff.
Rare Arizona plant now on endangered list
The plant depends on wetlands for survival
Summer heat arrives
Experts talk about increasing heat in urban heat islands and the history of air conditioning.
Residents in Cochise County organize vote to establish water regulation
Many in the Douglas and Willcox Basins say their wells are going dry as big business moves in around them
Here's how to help prevent wildfires this summer
Just over half of wildfires in the Southwest are human-caused.
Sonora governor: Desalination will have to be part of state water supply
With at least a dozen neighborhoods in Hermosillo already experiencing water shortages this summer, the state is confronting a future without enough water for residents.
Hydropower customers could pay extra fees
Federal law requires fees be paid whether or not dams are generating power.
Hudbay wins a round in court
A judge ruled the Rosemont and Copper World mines are not legally related.
For this summer's water forecast, climate experts are looking back to winter
Snow is the key to water in Arizona and other the Colorado River Basin states.
High pollution advisory for Tucson on Friday
Pima County officials are encouraging anyone especially sensitive to ozone to avoid physical exertion outside until 6 p.m.
Appeals court rules against mine project in Santa Rita Mountains
The court cited the planned use of Coronado National Forest land for long-term storage of waste rock and the lack of valuable minerals on the property.
Inbreeding won’t doom the endangered vaquita marina — but fishing nets might
Research now finds that, genetically speaking, there is still hope the vaquita population can recover.
High pollution advisory for Tucson
The Pima County Department of Environmental Quality issued an advisory Friday for ground-level ozone air pollution.
