Global temperatures in August 2025 reached alarming levels, making it the third-hottest August ever recorded. The month saw deadly heatwaves and wildfires across Europe and Asia, while oceans reached near-record warmth.
According to the Copernicus Climate Change Service, average global temperatures in August rose 1.29°C above pre-industrial levels. Although slightly lower than the 2023 peak, this figure matches 2024. Scientists warn that even small increases are destabilizing the climate and intensifying extreme weather events worldwide.
Western Europe recorded some of the sharpest anomalies. Spain faced a 16-day heatwave that led to more than 1,100 deaths, according to the Carlos III Health Institute. Southwest France and the Iberian Peninsula also endured extreme heat, marking the third major wave of the summer.
Wildfires added to the crisis. Large blazes swept through Spain and Portugal, forcing thousands to evacuate. Experts said human-driven climate change made the hot, dry, and windy conditions up to 40 times more likely.
Beyond Europe, abnormal heat was reported in Siberia, Antarctica, China, Japan, the Korean Peninsula, and the Middle East. National data confirmed that the UK, Japan, and South Korea all experienced their hottest summers on record.
Oceans also hit near-record highs in August 2025, particularly in the North Atlantic near France and the UK. Warmer seas are linked to stronger storms, flooding, and longer heatwaves, adding to the global climate crisis.
Samantha Burgess, climate lead at Copernicus, stressed the urgency of reducing emissions and adapting to more frequent extreme events. She warned that current patterns show a dangerous trajectory if action is delayed.
Data collected by Copernicus, based on satellite and weather records dating back to 1940, confirms the long-term warming trend driven by fossil fuel emissions.
The extreme conditions of August 2025 highlight how even incremental rises in global temperature can have deadly consequences, reinforcing calls for urgent climate action.
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