Straight out of the March textbook, a major storm will hammer in the Midwest this weekend, followed by a blast of cold air into the Southeast. Here's the latest forecast.

A super El Niño is possible by the end of the year. Here's what warming waters in the Pacific could mean for this summer and the rest of the year.

Historic heat or another dose of winter? The seasons are battling it out across the U.S. as we head into next week.

Hawaii’s Kilauea volcano erupts more frequently than almost every other volcano on Earth, but Tuesday’s episode was different. The 1,000-foot-high lava fountains were responsible for temporarily closing parts of the park and a nearby highway. The reason? Falling ash and glassy fragments known as tephra made it too dangerous for visitors and travelers alike. Watch this video to see more of the eruption.

In California's high mountain lakes, male frogs are in a race against time with only three weeks to find a mate before the water refreezes. Their croak speed is a precise thermometer that tells females whether conditions are warm enough for eggs to survive. But climate change is shifting when these lakes thaw and freeze, throwing off timing fine tuned over millennia.