The planet trapped a record amount of heat in 2025, raising serious concerns about long-term climate consequences, according to a new report released by the World Meteorological Organization. Scientists warned that the accumulated heat could affect Earth’s climate system for centuries or even thousands of years. The findings highlight the growing imbalance in the planet’s energy system as greenhouse gas emissions continue to rise. Experts say this trend is pushing global climate conditions closer to dangerous and irreversible thresholds.
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The report confirmed that the 11 hottest years ever recorded all occurred between 2015 and 2025, showing a clear pattern of rapid global warming. Last year ranked among the hottest years on record, with global temperatures reaching about 1.43 degrees Celsius above the pre-industrial average from 1850 to 1900. This sustained rise in temperatures has intensified heatwaves, storms and extreme weather events across several regions. Scientists say these developments clearly indicate the accelerating pace of climate change worldwide.
Meanwhile, Antonio Guterres warned that the global climate is now in a state of emergency. He stressed that every major climate indicator is signaling serious danger as the planet continues to warm. Guterres emphasized that experiencing 11 consecutive record-breaking hot years cannot be dismissed as coincidence. Instead, he urged governments and societies to recognize it as a clear warning that immediate action is required.
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A major factor behind the rising heat is the growing concentration of greenhouse gases such as carbon dioxide, methane and nitrous oxide. Scientists said these gases have reached their highest levels in at least 800,000 years, disrupting the natural balance between incoming solar energy and heat leaving the Earth. As a result, the planet’s energy imbalance has steadily increased since observations began in 1960. Researchers noted that the imbalance reached a new peak in 2025.
Furthermore, the report revealed that more than 91 percent of the excess heat is being absorbed by the world’s oceans. Ocean heat content reached another record high in 2025, while the rate of warming has more than doubled since the early 2000s. This warming threatens marine ecosystems, reduces biodiversity and weakens the ocean’s ability to absorb carbon dioxide. Scientists also warn that warmer oceans fuel stronger tropical storms and accelerate the melting of polar sea ice.
At the same time, ice sheets in Greenland and Antarctica continue to lose mass, while Arctic sea ice levels have dropped to among the lowest ever recorded in the satellite era. Rising ocean temperatures have also pushed global sea levels about 11 centimeters higher than they were in 1993. Experts say ocean warming and sea-level rise will continue for centuries, even if emissions are reduced. Climate scientists therefore warn that urgent global action is needed to slow the accelerating climate crisis.