Climate stability used to be measured in centuries; today it’s measured in years. The planet, much like a generational chart topper, has been on a sustained heat streak. Global heat has been compounding over the years with the surface temperature reaching 1.54 °C above pre-industrial levels in November 2025. Even the cooling influence of La Niña during the start and end of 2025 couldn’t do much to dissuade this trajectory.
This isn’t just an isolated spike, with a broader assessment by the WMO showing that the past three years (2023–2025) were one of the hottest trios ever recorded, while the last 11 years (2015–2025) were the 11 warmest in at least 176 years of instrumental data.
The reality of crossing 1.5°C is no longer hypothetical as monthly averages keep clearing the bar. 2023 climbed to about 1.8°C, while 2025 mostly strutted around 1.4–1.6°C, repeatedly breaching the 1.5°C line.
Closer to the limit
The world isn’t just getting warmer, it is approaching thresholds that climate scientists flagged and warned about, but no one seems to heed the warning. Under the current trends the planet is on pace to surpass the key Paris Agreement target above pre-industrial levels; unless emissions drop dramatically, which seems very unlikely. Albeit the target wasn’t arbitrary rather serving as a key line in climate risk models but exceeding that threshold isn’t just semantics, it changes outcomes entirely.
Even an iota of difference between temporary overshoot and sustained exceedance above 1.5 °C can trigger the likelihood of more frequent and severe droughts, floods, wildfires, and shifting climate zones which would take centuries to reverse. Even adjusting to current thresholds; damages to major crops would cost $63 billion for acclimating, while 14% of the world’s species would be pushed to extinction. A warmer world means more danger to every life.
Berkeley Earth estimates that 770 million people, that's basically one in every 12 globally, who experienced record annual heat, including about 450 million in China alone. Temperature records were also set across large parts of Australia, northern Africa, the Arabian Peninsula, and even Antarctica, while the United States logged its fourth warmest year on record in 2025.
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