Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.

Chicago is facing a dangerous lake-effect snow event overnight Sunday into Monday morning. A narrow, but extremely intense ...

Here’s what else you need to know to get up to speed and on with your day.

Hurricane Melissa is expected to make landfall in Jamaica Tuesday, bringing severe winds and flooding. For survivors, the dangers don’t end when the storm passes — hidden hazards like mold, structural ...