An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" sends a devastating blast of Arctic air, bringing heavy snows and freezing rains.

Mountain regions around the world are heating up faster than the lands below them, triggering dramatic shifts in snow, rain, and water supply that could affect over a billion people. A major global review finds that rising temperatures are turning snowfall into rain,

A new MIT Global Change Outlook finds current climate policies and economic indicators put the world on track for dangerous warming

Scientists calculate that last year was one of the three hottest on record, along with 2024 and 2023. The trend indicates that warming could be speeding up, climate monitoring teams reported.

Follow live updates from The Courier Journal as Winter Storm Fern arrives in Louisville with bands of heavy snow and bitterly cold temperatures.