The report indicates that the years from 2015 to 2025 have become the hottest in recorded history, with 2025 likely to rank among the highest in temperature. Last year, air temperature was 1.43 degrees Celsius higher than in the pre-industrial period of 1850-1900.
UN Secretary-General António Guterres noted: "Every key climate indicator signals danger. When the same event occurs eleven times in a row, it is not just a coincidence; it is a call to action".
Issues of Ocean Warming and Glacier Disappearance
The world's oceans, which absorb more than 91% of excess heat, have reached record temperatures. Over the past two decades, they have accumulated energy equivalent to eighteen years' worth of human energy consumption.The situation with glaciers is also alarming: Arctic sea ice in 2025 reached minimal levels, while Antarctica recorded the third lowest values in the history of satellite observations. Massive glacier losses have been recorded in Iceland and along the North American coast.
The global sea level continues to rise and is already 11 cm higher than in 1993, when satellite measurements began. Experts note that these changes will continue for centuries, and changes in ocean temperature and acidity will remain unchanged for millennia.
Energy Imbalance
For the first time, the WMO included information about the Earth's energy imbalance in the report—the difference between solar energy that reaches the planet and the heat it radiates. This imbalance has reached a maximum in 65 years of observation."Human activity is increasingly disrupting the natural balance, and we will have to live with the consequences of this phenomenon for hundreds and thousands of years," emphasized WMO Secretary-General Celeste Saulo.
"Delay Could Cost Lives"
In 2025, extreme weather conditions—from droughts to floods and wildfires—led to thousands of casualties, millions affected, and significant economic losses. The report also notes an increase in food security issues, rising migration, and worsening public health, including the spread of dengue fever and increased heat stress.António Guterres stated: "In an era of conflict, climate change highlights another truth: our dependence on fossil fuels undermines both climate and global security. This report should serve as a warning: climate chaos is escalating, and delay could cost lives."
The photo on the main page is illustrative: Adobestock / Fahad.
