The Earth’s climate is more out of balance than at any time in observed history. Greenhouse gas concentrations continue to drive the rapid warming of atmosphere, oceans and melting ice caps, says the World Meteorological Organization in its flagship State of the Global Climate report.
This year’s report confirms that. These large-scale changes occurred within a few decades but will have harmful repercussions for potentially thousands of years.
UN Secretary-General António Guterres declared that the state of the global climate is currently in a state of emergency. He warned that every key climate indicator is now flashing red as planet Earth is pushed beyond its limits. Humanity has just endured the eleven hottest years on record, which Mr Guterres described as a call to act. The theme for this year’s World Meteorological Day is “Observing Today, Protecting Tomorrow,” emphasizing the need for immediate action.
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The Eleven Hottest Years: A Decisive Record of Warming
The WMO report confirms that the period between 2015 and 2025 represents the hottest eleven-year streak ever recorded. Specifically, 2025 was the second or third hottest year on record, at approximately 1.43 °C above the average. This warming level is dangerously close to the 1.5 °C threshold established by international climate agreements and scientific warnings. Consequently, extreme events around the world, including intense heat and tropical cyclones, caused massive disruption and widespread devastation.
In India, this warming manifested as an unusually early heatwave that shattered local temperature records in several different states. New Delhi recorded its hottest day of the year on March 11, reaching a staggering 36.8°C for its citizens. Experts noted that this early heat appeared even before the spring season had properly begun in the northern regions. This extreme weather highlights the vulnerability of our interconnected economies and societies as traditional seasonal patterns continue to shift.
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Measuring the Energy Imbalance: A New Climate Indicator
For the first time, the WMO report includes the Earth’s energy imbalance as one of its key climate indicators. This metric measures the rate at which solar energy enters and leaves the entire Earth system during the year. Under a stable climate, the incoming energy from the sun should be roughly equal to the outgoing energy released. However, increasing concentrations of heat-trapping greenhouse gases have now upset this natural equilibrium and created a significant surplus.
Concentrations of carbon dioxide, methane, and nitrous oxide are currently at their highest levels in at least 800,000 years. These gases prevent heat from escaping the atmosphere, causing the Earth’s energy imbalance to increase steadily since 1960. Furthermore, this imbalance reached a new high in 2025, particularly intensifying over the past twenty years of human activity. This surplus energy is the fundamental driver of the rapid warming we feel on the surface every day.
Oceans and Ice: The Hidden Reservoirs of Excess Heat
The warming of the atmosphere represents only about 1% of the excess energy trapped by greenhouse gas emissions today. In contrast, approximately 5% of this energy is stored in the continental land masses across the entire globe. The vast majority of the remaining energy is absorbed by the world’s oceans, which act as a massive heat sink. Consequently, the ocean has absorbed the equivalent of eighteen times the annual human energy use for two decades.
This intense absorption leads to significant changes in marine ecosystems and contributes to the rapid melting of polar ice. Annual sea ice extent in the Arctic was at or near a record low during the last year. Similarly, Antarctic sea ice extent was the third lowest on record, while glacier melt continued unabated across the world. These changes threaten coastal communities with rising sea levels and disrupt the global currents that regulate our weather.
Extreme Weather in 2025: The Human and Economic Toll
The year 2025 was marked by heatwaves, wildfires, drought, tropical cyclones, and devastating flooding in many different regions. These events caused thousands of deaths, impacted millions of people, and resulted in billions of dollars in economic losses. Specifically, severe heatwaves in India and Pakistan strained public health systems and threatened the national food security of millions. WMO Secretary-General Celeste Saulo noted that human activities are increasingly disrupting the natural equilibrium of our planet.
The economic vulnerability of our interconnected world was further exposed by simultaneous geopolitical crises in the Middle East. As extreme weather destroyed crops, the Strait of Hormuz conflict caused oil prices to fluctuate wildly in global markets. Traffic through this vital energy chokepoint plummeted by 70%, creating a “grocery supply emergency” for several different nations. These overlapping crises demonstrate that climate instability acts as a threat multiplier for global security and economic stability.
The Ocean as a Global Thermal Buffer
More than 91% of the excess heat generated by human activity is currently stored within the world’s vast oceans. This massive heat absorption acts as a critical buffer that prevents even higher and more destructive temperatures on land. However, ocean heat content reached a new record high in 2025, signaling a deeply concerning shift in marine stability. The rate of ocean warming more than doubled between the 2005-2025 period compared to the previous 1960-2005 era.
This accelerated warming has devastating consequences for marine ecosystems and the global weather patterns that regulate our daily lives. Warm oceans fuel more intense tropical cyclones and disrupt the delicate balance of underwater habitats like coral reefs worldwide. Furthermore, the WMO report indicates that changes in deep ocean pH are now irreversible on centennial to millennial scales. We are fundamentally altering the chemistry of our seas in ways that humans cannot easily fix or naturally reverse.
The Rapid Decline of Global Ice Masses
Approximately 3% of the excess energy trapped by greenhouse gases is currently used to warm and melt global ice. The massive ice sheets on both Antarctica and Greenland have lost significant mass over the past several active decades. According to the report, the annual average Arctic sea-ice extent for 2025 was the lowest or second lowest recorded. This loss of reflective white ice creates a feedback loop that absorbs even more solar radiation into the dark sea.
Exceptional glacier mass loss occurred in Iceland and along the Pacific coast of North America during the last year. These glaciers serve as vital freshwater sources for millions of people and various agricultural industries in those specific regions. As these ice masses disappear, the surrounding ecosystems face immediate threats of drought and altered water flow patterns. The cryosphere is shrinking at a pace that far exceeds the historical norms observed by scientists during previous centuries.
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Accelerating Sea Level Rise and Coastal Threats
The combination of warming oceans and melting ice is driving a long-term rise in the global mean sea level. This rise has significantly accelerated since satellite measurements first began in 1993, threatening low-lying coastal cities and island nations. Projections by the IPCC suggest that ocean warming and sea level rise will continue for several centuries to come. This committed rise means that many coastal communities must now begin planning for permanent relocation or massive infrastructure upgrades.
Inland areas are also feeling the impact of these changes through shifting rainfall patterns and increased storm surge risks. Coastal erosion is destroying property and vital infrastructure, leading to significant economic losses for many developing and developed nations. The acceleration of these trends highlights the urgent need for robust coastal adaptation strategies and international cooperation efforts. We can no longer treat sea-level rise as a distant threat that will only affect future human generations.
The Human Toll: Climate and Health Risks
The 2025 report includes a dedicated chapter on climate and health, illustrating how rising temperatures directly affect human wellbeing. It shows how shifting rainfall patterns and extreme weather events change where and when various health risks eventually emerge. For example, mosquito-borne diseases like dengue are spreading into new regions as local climates become warmer and significantly wetter. Heat stress is also becoming a primary cause of mortality during the increasingly frequent and intense global heatwaves.
India’s recent experience with an early March heatwave perfectly illustrates these emerging health risks for large urban populations. New Delhi recorded a record-breaking 36.8°C on March 11, placing immense strain on the city’s public health and energy infrastructure. The WMO emphasizes that climate data and early warning systems are essential tools for protecting people in this warming world. Integrated climate services for health can help medical professionals prepare for surges in heat-related illnesses and infectious disease outbreaks.
Cascading Impacts: Food Insecurity and Displacement
The WMO report is accompanied by an interactive story map that highlights the cascading impacts of extreme weather events. These events often lead to severe food insecurity and the large-scale displacement of vulnerable populations across different continents. When droughts destroy crops or floods ruin harvests, the resulting economic shock can trigger social unrest and regional conflict. The report highlights that climate stress is a powerful threat multiplier in an age already defined by war.
Global supply chains, such as the one passing through the Strait of Hormuz, are particularly vulnerable to these disruptions. As seen in recent weeks, regional instability can lead to “grocery supply emergencies” and soaring inflation for essential goods. Agentic AI is being deployed to manage these supply chain shocks, but it cannot solve the underlying climate crisis. The interconnected nature of our world means that a climate disaster in one region affects everyone, everywhere.
Critical Analysis: The Limits of Diplomacy and Technology
The 2025 WMO report serves as a stark reminder that our current efforts are failing to restore climate balance. While international diplomacy focuses on regional conflicts, the fundamental biological and physical systems of our planet are breaking down. We are seeing a transition from a “rules-based order” to a reality defined by ecological and resource desperation. The focus on immediate military ultimatums often ignores the long-term repercussions of pushing the Earth beyond its natural limits.
Furthermore, the rise of technologies like Agentic AI offers a “digital safety net” that may create a false sense of security. While autonomous agents can manage “self-healing” supply chains, they cannot fix the fundamental energy imbalance of the entire planet. We must avoid relying on technological shortcuts to solve problems that require deep systemic changes in how we live. If we continue to disrupt the natural equilibrium, we will live with the consequences for thousands of years.
Q&A: Understanding the WMO 2025 Report
What is the Earth’s energy imbalance mentioned in the report?
It is the difference between the solar energy entering the Earth and the heat energy leaving the system. Greenhouse gases prevent energy from leaving, causing the planet to heat up rapidly.
How does the ocean affect global warming?
The ocean absorbs over 90% of the excess heat trapped by greenhouse gases, which protects the atmosphere but causes sea-level rise and ice melt.
Why was 2025 a significant year for climate data?
It was the second or third hottest year on record and saw the energy imbalance reach a new historic high.
FAQ: Frequently Asked Questions
How much warmer was 2025 compared to the pre-industrial average?
The year 2025 was approximately 1.43 °C above the 1850-1900 average, nearing the critical 1.5 °C limit.
What are the hottest years on record?
The WMO report confirms that the last eleven years (2015-2025) are officially the hottest on record for humanity.
What percentage of excess energy stays in the atmosphere?
Only 1% of the excess heat energy remains in the atmosphere, while the rest is absorbed by oceans and land.
When was the State of the Global Climate report released?
The report was released on 23 March, which is celebrated globally as World Meteorological Day.
Are greenhouse gas levels at an all-time high?
Yes, levels of carbon dioxide and methane are at their highest concentrations in at least 800,000 years.
Key Climate Indicators
| Indicator | Status in 2025 | Impact Level |
| Global Temperature | 1.43°C above average | Critical |
| Energy Imbalance | Record High | Extreme |
| Arctic Sea Ice | Near Record Low | Severe |
| Ocean Heat | 18x Human Energy Use | Extreme |
| Greenhouse Gases | Highest in 800k Years | Critical |
Conclusion: A Call for Generational Action
The State of the Global Climate in 2025 is a clear emergency that requires immediate and coordinated global action. We can no longer afford to treat climate change as a distant threat that will only affect future generations. The record heatwaves, shrinking ice caps, and rising energy imbalance are happening right now across every single continent. Humanity must listen to the sirens flashing red and work together to restore the equilibrium of our only home.