A World Meteorological Organisation (WMO) state of the climate report confirmed that 2015-2025 are the hottest 11-years on record.
The year 2025 was the second or third hottest year on record, at about 1.43 °C above the 1850-1900 average.
The WMO attributed extreme events around the world, including a warming ocean, to climate change.
These events were intense heat, heavy rainfall and tropical cyclones.
António Guterres, UN Secretary-General, said “the State of the Global Climate is in a state of emergency. Planet Earth is being pushed beyond its limits. Every key climate indicator is flashing red. Humanity has just endured the eleven hottest years on record. When history repeats itself eleven times, it is no longer a coincidence. It is a call to act.”
The WMO’s flagship State of the Global Climate report was released on World Meteorological Day on Monday, the 23 March.
The report also highlighted an increase in concentrations of heat-trapping greenhouse gases – carbon dioxide, methane and nitrous oxide – to their highest level in at least 800,000 years.
The warming ocean and melting ice are driving the long-term rise in global mean sea level, which has accelerated since satellite measurements began in 1993.