Sea temperatures around the world were the second highest on record for the month of April, stoking concerns among scientists that an El Niño warming cycle is brewing that would intensify extreme weather.
The naturally occurring El Niño weather phenomenon, where water temperatures in the central and eastern tropical Pacific Ocean become significantly warmer, temporarily accelerates the rise in global air temperature, resulting in the spread of fires, floods and droughts.
The EU’s Copernicus Climate Change Service reported record sea-surface temperatures across much of the tropical Pacific in April, while the global average for non-polar oceans reached 21C — just shy of the 21.04C record set in April 2024 during the last El Niño event.
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