El Niño 2026: Global Weather Shake‑Up as Pacific Warmth Expands

Satellite data from 8 June 2026 showed higher‑than‑normal sea‑surface temperatures across the central and eastern Pacific, prompting scientists to declare an El Niño event. The warming is driven by a Bjerknes feedback loop: a surge of warm water reduces the upwelling of cold, nutrient‑rich water that fuels Peru’s anchovy fishery, further heating the surface. The warm surface then heats the air above it, lowering atmospheric pressure and weakening trade winds, which allows even more warm water to pile up. This process releases trillions of joules of heat into the atmosphere, raising global temperatures and setting the stage for 2027 to become the hottest year on record. The altered Walker circulation shifts rainfall patterns—drought and wildfires in Indonesia and the Amazon, increased flooding in eastern Africa, and more storms in the southern United States and occasionally the UK. The event also disrupts marine ecosystems and intensifies extreme weather worldwide.