The ocean has shielded us from the worst of climate change. Now it is running a fever | Karina Von Schuckmann (opens in new tab)

Nearly every indicator of climate change is flashing red. But we still hold the tools available to bring the planet back into balanceThe ocean is running a fever. In 2025, the number of days of marine heatwaves – prolonged spells when the sea turns abnormally, dangerously warm – was more than triple what it was in the early 1990s.These are not abstract statistics. A severe and persistent marine heatwave bleaches coral reefs, strips away the kelp forests that shelter young fish, empties fishin...