Winter’s last-ditch big freeze is about to make way for 100F record heat as the US sets stage for a "battle of the seasons".

Nineteen states from Nebraska to Florida are facing cold weather alerts on Friday morning as a relentless Arctic blast persists ... fourth morning in a row of record-low temperatures across ...

Get all the news you need in your inbox each morning. The Arctic blast has broken dozens of decades-old records across the country this week. On Thursday, low temperatures in Midland, Texas ...

Arctic temperatures spiked 36 degrees Fahrenheit, or 20 Celsius, above normal. By the end of the month, sea ice was at its ...

A polar vortex collapse is an event that occurs when the layer between 10km and 50km above Earth’s surface warms up to 50 degrees in just two days. This scientific phenomenon is known as sudden ...

Researchers there also noted that the Arctic had seen record-low levels of ice compared with previous Februaries, in part because of air temperatures that were more than 20 degrees above average.