Europe is witnessing a record-breaking heatwave, with temperatures rising sharply across several regions. The world’s oceans have also recorded their hottest June on record, surpassing levels seen during the 2023-24 El Niño years. Scientists say parts of the Mediterranean Sea are up to six degrees Celsius warmer than the long-term average.Parts of the North Sea are also around three degrees Celsius above normal. The developing El Niño has pushed sea surface temperatures to about 1.24 degrees Celsius above average across a large part of the central and eastern Pacific Ocean.The average sea surface temperature across the world’s tropical and temperate oceans is currently just under 21 degrees Celsius. Before widespread industrialisation in 1870, it was about 19.6 degrees Celsius. Scientists say the El Niño developing over the tropical Pacific is expected to raise global temperatures and increase the risk of extreme weather events, including marine heatwaves in the western Indian Ocean, the tropical Atlantic and the eastern Pacific Ocean.
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