Manatees will spend the next several months swimming to and from warm water retreats in Florida as their nature requires ...

"It was so magical," says Kullberg, remembering the first time she saw it with her own eyes. The Boiling River, also known as ...

Warmer water has negatively impacted the trout population in the Colorado River near Lees Ferry. Businesses that rely on fishing have also felt the economic impact.

That's the sight—and smell—that greeted people along the Klamath River in September 2002, when 35,000 fish perished there in the span of a few days. They were victims of warm water ...