A huge winter storm sweeping across the southern US has killed at least 21 people and left millions without power. There have been widespread blackouts in Texas, where the energy grid was overwhelmed a...

Associating climate change, normally connected with roasting heat, with an unusual winter storm that has crippled swaths of Texas and brought freezing temperatures across the southern US can seem counterintuitive....

The U.S. has endured a wild stretch of harsh winter weather lately thanks to an invasion of the infamous polar vortex. It may be counterintuitive, but could global warming have caused this? First, an The...

(CNN) — The dangerous cold across the Central and Southern US has brought extremely low temperatures -- and unusually long stretches of time without much warming. Here is a sample of cold stretches for...