UN climate agency issues ‘red alert’, says 2024 may break heat records

The UN weather agency is sounding a “red alert” about global warming, citing record-smashing increases last year in greenhouse gases, land and water temperatures and melting of glaciers and sea ice, and warning that the world's efforts to reverse the trend have been inadequate.

The World Meteorological Organization said there is a “high probability” that 2024 will be another record-hot year.

The Geneva-based agency, in a “State of the Global Climate” report released Tuesday, ratcheted up concerns that a much-vaunted climate goal is increasingly in jeopardy: That the world can unite to limit planetary warming to no more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) from pre-industrial levels.

“As Secretary-General of the World Meteorological Organization, I am now sounding the red alert about the state of the climate,” said Celeste Saulo.

The 12-month period from March 2023 to February 2024 pushed beyond that 1.5-degree limit, averaging 1.56 C (2.81 F) higher, according to the European Union's Copernicus Climate Service.

It said the calendar year 2023 was just below 1.5 C at 1.48 C (2.66 F), but a record hot start to this year pushed beyond that level for the 12-month average.

Omar Baddour, WMO's chief of climate monitoring, said the year after an El Niño event — the cyclical warming of the Pacific Ocean that affects global weather patterns — normally tends to be warmer.

“So we cannot say definitively about 2024 is going to be the warmest year. But what I would say: There is a high probability that 2024 will again break the record of 2023, but let’s wait and see,” he said.

The latest WMO findings are especially stark when compiled in a single report. In 2023, over 90% of ocean waters experienced heat wave conditions at least once. Glaciers monitored since 1950 lost the most ice on record. Antarctic sea ice retreated to its lowest level ever.

Saulo called the climate crisis “the defining challenge that humanity faces” and said it combines with a crisis of inequality, as seen in growing food insecurity and migration.

WMO said the impact of heatwaves, floods, droughts, wildfires and tropical cyclones, exacerbated by climate change, was felt in lives and livelihoods on every continent in 2023.

But the agency also acknowledged “a glimmer of hope” in trying to keep the Earth from running too high a fever. It said renewable energy generation capacity from wind, solar and waterpower rose nearly 50% from 2022 to a total of 510 gigawatts.

The report comes as climate experts and government ministers are to gather in the Danish capital, Copenhagen, on Thursday and Friday to press for greater climate action, including increased national commitments to fight global warming.

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