"Climate change worsened by human behavior made 2025 one of the three hottest years on record, scientists said. It was also the first time that the three-year temperature average broke through the threshold set in the 2015 Paris Agreement of limiting warming to no more than 1.5 degrees Celsius (2.7 Fahrenheit) since preindustrial times. Experts say that keeping the Earth below that limit could save lives and prevent catastrophic environmental destruction around the globe."
"Temperatures remained high despite the presence of a La Nina, the occasional natural cooling of Pacific Ocean waters that influences weather worldwide. Researchers cited the continued burning of fossil fuels - oil, gas and coal - that send planet-warming greenhouse gases into the atmosphere. "If we don't stop burning fossil fuels very, very, quickly, very soon, it will be very hard to keep that goal" of warming, Friederike Otto, co-founder of World Weather Attribution and an Imperial College London climate scientist, told The Associated Press. "The science is increasingly clear.""
"Extreme weather events kill thousands of people and cost billions of dollars in damage annually. WWA scientists identified 157 extreme weather events as most severe in 2025, meaning they met criteria such as causing more than 100 deaths, affecting more than half an area's population or having a state of emergency declared. Of those, they closely analyzed 22. That included dangerous heat waves, which the WWA said were the world's deadliest extreme weather events in 2025. The researchers said some of the heat waves they studied in 2025 were 10 times more likely than they would have been a decade ago due to climate change."
2025 ranked among the three hottest years on record and the three-year global temperature average exceeded the 1.5°C limit relative to preindustrial times. Temperatures stayed high despite a La Niña, with researchers attributing the trend to ongoing burning of fossil fuels that adds greenhouse gases to the atmosphere. World Weather Attribution identified 157 extremely severe weather events in 2025 and closely analyzed 22 of them, finding dangerous heat waves to be the deadliest. Some heat waves were estimated to be up to ten times more likely because of climate change, causing thousands of deaths and billions in damages.
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