The Climate Shift Index: Ocean quantifies the influence of climate change on sea surface temperatures. It’s grounded in peer-reviewed attribution science and was launched by Climate Central in 2024.

The energy that supercharged Hurricane Milton into a Category 5 storm on Monday came from the waters of the Gulf of Mexico, which have been abnormally warm not just at the surface, but at depth, too.

Marine-climate interventions have received increased money and attention in recent years. While many projects and ideas may be well-intentioned, they’re generally not subject to strong governance or ...