Will people continue to hike and bike the Arizona Trail? Extreme weather and land use challenges may test the limits.

Over seven weeks this fall, Arizona Republic climate reporter Joan Meiners is biking the length of the 850-mile Arizona Trail ...

Arizonans saw the Grand Canyon fill with smoke and clean energy companies shutter, but celebrated resilient leaders and fewer ...

2025 was the second-hottest year on record in Phoenix, according to National Weather Service data. Only 2024 had a hotter ...

As Phoenix emerges from its hottest year on record, President Donald Trump signed a series of orders designed to expand U.S. fossil fuels production and relax climate-related regulations in his first ...

Phoenix Fire Capt. Todd Keller waited Friday afternoon for a call from FEMA. He stands ready to send 45 firefighters from Phoenix's Arizona Task Force 1 team to help quell the devastating destruction ...

Tucson and Phoenix experienced record-breaking and record-tying heat throughout the summer of 2024. Both cities’ average summertime daily temperatures have jumped 4 to 5 degrees monthly since 1970.

In 1960, a newspaper article published in the Tucson Citizen offered “zippy girls” an opportunity to help advertise Arizona’s climate to the world. Bob Riddell, publicity manager for the Tucson ...

Invasive Scud Is Threatening the Great Lakes. Pollution Might Be Helping to Keep It Back. Murdoch Media Wrongly Pinned NJ High Electricity Costs on Clean Energy, Says Watchdog A Massive, ...

PHOENIX — Climate change was the subject of a lot of conversation on the lawn outside the Arizona House of Representatives on Wednesday morning. The group Organizing for Acton may have been at the ...

Stefan Lovgren writes on how freshwater fish from the Arctic to Africa are endanged by climate change and the unpredictable ...