Heatwaves sweeping oceans ‘like wildfires’, scientists reveal

Extreme temperatures destroy kelp, seagrass and corals - with alarming impacts for humanity

The number of heatwaves affecting the planet's oceans has increased sharply, scientists have revealed, killing swathes of sea-life like "wildfires that take out huge areas of forest".

The damage caused in these hotspots is also harmful for humanity, which relies on the oceans for oxygen, food, storm protection and the removal of climate-warming carbon dioxide the atmosphere, they say.