The latest report from the United Nations’ World Meteorological Organization (WMO) lays bare the alarming state of the Earth’s climate, revealing that our planet is retaining unprecedented levels of heat energy. This growing imbalance, driven primarily by greenhouse gas emissions, is causing ocean temperatures to soar and ice caps to melt. As we brace for the onset of the El Niño phenomenon later this year, scientists warn that we could witness even higher temperature records, exacerbating an already critical situation.
A Record Heat Imbalance
The WMO’s report highlights that the last eleven years represent the hottest period ever recorded since systematic data collection began in 1850. In 2025, global average temperatures were approximately 1.43°C higher than pre-industrial levels, a stark reminder of the consequences of humanity’s reliance on fossil fuels.
While a temporary cooling effect from the natural La Niña weather pattern in 2025 slightly mitigated the heat, it was still one of the three warmest years ever documented. This ongoing trend of rising temperatures is increasingly concerning, as many scientists now believe that the rate of warming is accelerating. The WMO notes that the energy imbalance—the amount of extra heat the Earth is absorbing—reached an all-time high last year, fundamentally driving climate change.
The Role of Greenhouse Gases
The report attributes this alarming energy imbalance to the rise in greenhouse gas levels, especially carbon dioxide (CO2), which have reached their highest concentration in at least two million years. Human activities, notably the burning of fossil fuels, are the primary culprits. As CO2 traps heat in the atmosphere, it not only warms the land but also melts glaciers and polar ice, with the world’s glaciers suffering one of their worst years on record in 2024/25.
The ramifications are staggering: over 90% of the additional heat is absorbed by the oceans, leading to detrimental effects on marine ecosystems, more severe storms, and rising sea levels. The WMO reported that the heat stored in the upper two kilometres of the global ocean hit a new high last year. Alarmingly, this upper layer of the ocean is warming more than twice as quickly as it did in the late 20th century.
Escalating Extreme Weather Events
The report underscores the immediate impacts of rising temperatures, which are intensifying extreme weather patterns and aiding the spread of diseases like dengue fever. For instance, the southwestern United States is currently experiencing a record early-season heatwave, with temperatures soaring above 40°C—10 to 15 degrees higher than average.
A rapid analysis by the World Weather Attribution group indicated that the severity of this heatwave would have been “virtually impossible” without the influence of human-driven climate change. Furthermore, researchers are closely monitoring the Pacific Ocean, where forecasts strongly suggest that the warming El Niño phase could emerge in the latter half of 2026. If this happens, it may further elevate global temperatures into 2027.
The Call for Action
In light of these alarming findings, UN Secretary-General António Guterres has once again urged nations to pivot away from fossil fuels and towards renewable energy solutions. He emphasised the need for such a transition to achieve climate security, energy security, and national security. “Planet Earth is being pushed beyond its limits. Every key climate indicator is flashing red,” he warned in a passionate video address.
Experts like Professor Celeste Saulo, the WMO’s Secretary-General, echo this sentiment, stating, “Human activities are increasingly disrupting the natural equilibrium, and we will live with these consequences for hundreds and thousands of years.”
Why it Matters
The implications of this report are profound and far-reaching. As climate change continues to unfold at an alarming rate, we face not only environmental degradation but also extensive socio-economic challenges. The urgency to mitigate these crises has never been greater, as we find ourselves at a pivotal moment that will define our planet’s future. Addressing the climate emergency is not just an environmental imperative; it is essential for ensuring the health, safety, and security of generations to come.
