Arctic has hottest year ever recorded, as climate impacts cascade

The Arctic has experienced its hottest year since records began, a US science agency announced on Tuesday, as climate change triggers cascading impacts from melting glaciers and sea ice to greening landscapes and disruptions to global weather. Between October 2024 and September 2025, temperatures were 1.6 degrees Celsius (2.88 Fahrenheit) above the 1991-2020 mean, the National Oceanic and Atmospheric Administration said in its annual Arctic Report Card, which draws on data going back to...