In less than a month, monsoon 2021 crushed entire 2020 season

Officially at the airport, 1.64 inches in 2021 after getting only 1.62 in 2020.

Ask a Ranger: A.E. Douglass and diaries of the trees

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.

Researchers roll out new process for lighter, more efficient solar power technology

Imagine a television so thin that it could be rolled up like a newspaper, or a thin film that could coat an entire building and generate solar power. Perovskites could make this possible.

UA professor researching cloud seeding to make it rain

Here in the desert, we can always use some rain — and Armin Sorooshian can make it happen. Sort of.

Monsoon is set to unleash flooding rains in drought-stricken Arizona

The punishing heat wave continues in much of the West. However, for some in places in the Southwest including Arizona, the long-awaited monsoon will bring milder temperatures and rainfall.

Juniper trees usually thrive in Arizona's arid climate. The drought is killing them

Drying juniper berries litter the ground as Rusine Stanley plunges a water hose into empty tanks in her backyard. As bubbles begin to gurgle, each tank fills to the brim.

How will cities adapt to extreme heat?

Heatwaves are getting worse. Can urban America stay cool?

University of Arizona creates ‘Monsoon Fantasy’ game

The University of Arizona recently launched a new game, in which the public can estimate rain measurements during the monsoon season and win prizes. 

'You put yourself in incredible peril': Extreme heat can be deadly for border crossers, officials warn

In the scorching heat, against the backdrop of a vehicle barrier separating the United States from Mexico, officials from federal agencies in both countries came together to explain the dangers of crossing their shared border.

Insects benefiting from early monsoon rains

Termites and mosquitoes are among those going through seasonal life cycles.

Carbon removal hype is becoming a dangerous distraction

Corporations and nations are touting plans to suck greenhouse gases out of the air. But the crucial priority this decade is slashing emissions.