UK waters hit with extreme heatwave as global sea temperatures reach record levels

Experts warn that some marine species are at risk of mass mortality events' in ever-warming oceans

UK waters are being hit with an extreme" marine heatwave, the Met Office has said, as scientists warn that high ocean temperatures globally could result in mass-mortality events" for some species.

The forecasters said these elevated temperatures have developed rapidly because of last month's heat dome, during which most of Europe sweltered in its worst ever heatwave that scientists said would have been impossible without the climate crisis.