President Donald Trump's tax and policy bill could slow Arizona's clean energy industry, but companies aren't talking.

View the latest weather forecasts, maps, news and alerts on Yahoo Weather. Find local weather forecasts for Mesa, United States throughout the world ...

According the the National Hurricane Center, Tropical Storm Flossie could strengthen into a hurricane as early as Monday.

New data shows that water levels in major reservoirs including Lakes Mead and Powell are well below average for this time of ...

A ground stop was underway at Sky Harbor, but it is now just a ground delay with the average delay lasting almost an hour.

The next presidential election is still a few years away, but Arizona's senators could be contenders in a wide-open ...

The National Climate Assessment is the most influential source of information about climate change in the United States.

How does it take for an animal to make its mark in history particularly when its bones are as delicate as a potato chip? Eotephradactylus mcintireae’s answer is a mix of volcanic ash, river ...

The next presidential election is still a few years away, but Arizona's senators could be contenders in a wide-open ...

The National Weather Service has created a countrywide map that shows when you might be most at risk of suffering with the ...

Scientists have launched the first global database of animal culture, revealing how species learn, communicate, and pass down traditions.

The diversity of ecosystems around Sierra Vista creates a wildlife viewing experience that rivals much more famous ...