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Underwater coral reef with group of tropical fish anthias, Red sea resort concept, Egypt

Global ocean roiled by marine heatwaves, with more on the way

The surface temperatures of about 40% of the global ocean are already high enough to meet the criteria for a marine heatwave — a period of persistent anomalously warm ocean temperatures — which can have significant impacts on marine life as well as coastal communities and economies. The new forecast by the Physical Sciences Laboratory (PSL) projects that it will increase to 50% by September, and it could stay that way through the end of the year.

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