Service has returned to normal on four Metra commuter lines, after issues related to the extreme cold delayed several trains during the Tuesday morning rush, and a freight train hit a pedestrian along ...

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, researchers found that two specific patterns in the polar vortex, a swirling ...

The blast of cold that fueled record snowfall across Gulf Coast beaches last week was just the latest to transport frigid air that normally swirls above the North Pole to places much farther south - a ...