Ocean temperatures have skyrocketed this spring, leaving scientists scrambling to figure out why. But the impacts are potentially catastrophic if temperatures continue to head off the charts.

This year’s biggest climate change news was that 2014 was hottest year on record. Turns out, there’s bigger news: It was also the hottest year in the oceans, which are warming so fast they’re ...

Ocean surface heat is at record-breaking levels. Temperatures began climbing in mid-March and skyrocketed over the course of several weeks, leaving scientists scrambling to figure out exactly why.