Severe weather is expected from Texas to Wisconsin over the next several days. Here's when you might need to change your plans.

As residents of Braman, Oklahoma, were warned to take cover, storm chasers captured surreal video of twin tornadoes spinning around each other near the town. The tornadoes seemed locked in a dance as they spun near the Kansas border. The Kay County Sheriff’s Office reported damage in the area, but not a direct hit on Braman.

A guy from Germany spent eight months planning his proposal to his girlfriend at California’s Yosemite National Park. What he didn’t plan on was severe storms moving into Yosemite Valley as he got down on one knee. But nature rewards the bold, and the couple ended up with a once-in-a-lifetime photo, as lightning hit El Capitan summit above them. See it for yourself and hear from the photographer who captured the incredible moment.

The new “State of the Air” report from the American Lung Association reveals the cleanest cities and air quality rankings across the country, from top-ranked metro areas like Bozeman, Montana and Casper, Wyoming to standout performers like Bangor, Maine. Did your city make the list?

A bald eagle may have thought it had its catch of the day, but an osprey decided otherwise. Incredible video captured their showdown on Kootenay Lake in Kaslo, British Columbia. The only thing better than the video may be the lakeside commentary from Ryan Dutchak, who recorded the epic battle. See who won!