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.

The annual gathering of top business leaders and policymakers used to be a center of the global climate movement. Things are much more complicated now.

Last year was the third hottest on record, with the World Meteorological Organization this week warning that 2025 continued a run of “extraordinary” global temperatures. The EU has said the Paris climate agreement of 1.5C could be broken before 2030, a decade sooner than expected.

Climate change is turbocharging heatwaves, wildfires, floods and tropical storms, but how deadly have extreme weather events become for people in their path?

Climate change is quietly rearranging the Amazon and Andes—winners and losers are emerging, and the Northern Andes may hold the key to forest survival.

Belgian biathlete Maya Cloetens is concerned about the future of winter sports in a warming world. Training in Grenoble, France, in the hopes of competing in next month's Winter Olympics in Milan and Cortina,

Research shows Americans are increasingly fretting about disasters — and even the end times. Hiding in a cave might actually protect you.