The summer of 2020 was hot, even for Tucson.

Another large fire season is casting smoke across the country, with conditions ripe for major devastation. But not all fires are bad, and the widespread burning also brings long-term benefits.

It's monsoon season in the American Southwest. For Arizona, New Mexico and Colorado, the seasonal rains are very important for rivers and pastures and for keeping wildfires in check. But climate change has made the monsoon less regular. Here's Michael Elizabeth Sakas from Colorado Public Radio.

Groundwater and streams vital to both farmers and cities are drying up in the West, challenging the future of development.

The record-smashing Pacific Northwest heat wave suggests that climate change has forced us past a threshold for temperatures.

After one of Tucson's driest years on record in 2020, recent flooding in the Santa Cruz River spells hope for a recovering riparian ecosystem and the water table lying beneath. 

A historic drought has desiccated much of the American West, bringing reservoir levels to record lows and stoking fears of catastrophic wildfires across the region.

Sometime next month, for the first time, the federal government is likely to declare a water shortage at Lake Mead.

SASKATOON – Researchers used synchrotron light to determine that plant waste could be an ideal, cost-effective method for preventing arsenic in mine waste from polluting our water.

Total victory might be out of reach, but Tucson’s war on weeds isn’t a hopeless quagmire.

June’s record-breaking heatwave was the final ingredient needed for explosive wildfire growth. Fire experts say things could still get much worse.

Andrew Ellicott Douglass came to Flagstaff as an astronomer. But he spent his time here looking as much at pine trees as at stars and planets. Ponderosa pine, the most common tree, became the object of his research — leading him to pioneer a revolutionary science.