Underrated bastion for trade across the globe, tugboats are more essential than many realize. These are the 10 most powerful ...

As a research scientist with the Arizona Geological Survey, Ann Youberg pays close attention to both wildfires and what could come next. That afterward part recently prompted Youberg to ask a ...

A new section of the Mount Lemmon area, including Willow Canyon, has been given evacuation orders amid the Bighorn Fire, which has nearly doubled in size since Tuesday. The area includes lower ...

Flights and rail services have been suspended and attractions such as the Great Wall and Forbidden City have been shut.