Data leads scientists to declare 2015 Paris agreement to keep global heating below 1.5C ‘dead in the water’

Last year was the third hottest on record, scientists have said, with mounting fossil fuel pollution behind “exceptional” temperatures.

The World Meteorological Organization (WMO) said 2025 had continued a three-year streak of “extraordinary global temperatures” during which surface air temperatures averaged 1.48C above preindustrial levels.