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Record global ocean temperatures and heatwaves across Europe in June 2026

In June 2026, global average sea surface temperatures reached a record 20.98°C, surpassing the 2024 record of 20.89°C, according to the Copernicus Climate Change Service. Simultaneously, Europe experienced severe heatwaves, with Austria recording its longest June heatwave, where temperatures exceeded previous records by 1.4°C. Spain reported at least 1,028 heat-related deaths in June, more than double the figures from the previous year. Portuguese authorities issued red alerts for Lisbon and Setúbal, with temperatures forecasted to reach 44°C in parts of central Portugal. Scientific analysis suggests that these extreme temperatures would have been nearly impossible without human-induced climate change, exacerbated by the El Niño phenomenon. The first half of 2026 is confirmed as the second warmest on record after 2024. Meteorologists and researchers warn that these conditions represent an ongoing trend of rising global temperatures.

Original Sources

Ocean temperatures hit record high in June
Sigmalive English · 1 July 2026, 11:55
France: 20 drown while trying to escape heatwave
Sigmalive English · 23 June 2026, 12:28
Σε κλοιό καύσωνα η Ευρώπη
Sigma Live News · 22 June 2026, 10:56