Europe's hottest-ever June may have killed over 20,000 people across the continent

Europe experienced its hottest June on record in 2025, with scientists confirming the extreme temperatures were driven by fossil fuel pollution and record-high ocean temperatures. The estimated death toll from the heat across the continent could exceed 20,000. The UK is enduring its third heatwave of the year, with expanded heat alerts, while scientists warn that high ocean temperatures could trigger mass-mortality events for some species.