The Earth's climate is currently more out of balance than at any point in recorded history, according to a recent warning from the United Nations’ World Meteorological Organization (WMO). This imbalance is characterized by the planet absorbing significantly more heat energy than it can release, a phenomenon primarily driven by the increased emissions of greenhouse gases such as carbon dioxide (CO2) due to human activities. This unprecedented “energy imbalance” has led to record-breaking ocean temperatures and accelerated melting of glaciers and polar ice caps, raising serious concerns about the future trajectory of global climate change.
The WMO’s report highlights that this energy imbalance reached a new peak last year, indicating that the Earth is heating up at a rate faster than previously observed. While natural climate patterns like El Niño and La Niña influence short-term temperature variations, the underlying trend is unmistakably driven by human-induced warming. For instance, although 2025 was slightly cooler than 2024 due to the temporary La Niña phase, it still ranked among the three warmest years ever recorded. The last 11 years have been the warmest on record since measurements began in 1850, with global average air temperatures in 2025 approximately 1.43 degrees Celsius above pre-industrial levels — the period before large-scale fossil fuel burning began.
UN Secretary-General António Guterres responded to the report by reiterating his urgent call for a global shift away from fossil fuels towards renewable energy sources. In a strongly worded video address, he emphasized that “Planet Earth is being pushed beyond its limits” and warned that every key climate indicator is now “flashing red.” Guterres stressed that addressing the climate crisis is not just an environmental imperative but also a matter of energy and national security, urging countries to act decisively to “deliver climate security, energy security and national security” simultaneously.
Central to understanding the severity of the current climate situation is the concept of Earth’s energy imbalance. This refers to the difference between the solar energy the planet absorbs and the energy it radiates back into space. Over the past decade, the Earth has been accumulating increasingly more heat energy, and scientists have identified greenhouse gases like CO2 as the primary cause. Atmospheric CO2 concentrations are now at their highest levels in at least two million years, driven largely by human activities such as fossil fuel combustion and deforestation.
This excess heat energy manifests in several damaging ways. While some of it warms the atmosphere and land, a significant portion contributes to melting glaciers and polar ice caps. According to provisional data from the WMO, the world’s glaciers experienced one of their five worst years of melting in 2024/25. Sea ice at both the Arctic and Antarctic remained at or near record lows throughout much of 2025, underscoring the rapid loss of these critical components of the Earth’s climate system.
Even more concerning is the fact that over 90% of the excess heat energy is absorbed by the world’s oceans. The upper two kilometers of the global ocean reached record high temperatures last year, with ocean warming over the past twenty years happening at more than twice the rate observed in the late 20th century. This ocean heat has profound consequences: it threatens marine ecosystems, fuels more intense and destructive storms, and contributes to rising sea levels through thermal expansion and ice melt. The WMO’s Secretary-General, Professor Celeste Saulo, warned that human activities are increasingly disrupting the planet’s natural equilibrium and that the consequences of this disruption will persist for hundreds or even thousands of years.
The warming trend is already intensifying extreme weather events around the world. For example, the southwestern United States is currently experiencing an early-season heatwave with temperatures exceeding 40 degrees Celsius in some areas — about 10 to 15 degrees Celsius above average for this time of year. Scientists from the World Weather Attribution group conducted rapid analysis and concluded that such extreme heat would have been “virtually impossible” without human-caused climate change, highlighting the direct link between global warming and more frequent, severe heatwaves.
Looking ahead, researchers are closely monitoring the Pacific Ocean, where forecasts strongly indicate the likely emergence of an El Niño phase in the latter half of 2026. El Niño is a natural climate phenomenon characterized by the periodic warming of sea surface temperatures in the central and eastern Pacific Ocean. When combined with the ongoing background warming trend caused by greenhouse gases, an El Niño event could push global temperatures to new record highs, potentially extending into 2027.
Dr. John