The world has entered a danger zone of extreme weather as the impacts of a "supersized" El Niño begin to manifest globally, United Nations Secretary-General António Guterres has warned. The World Meteorological Organization (WMO) released data indicating this El Niño event could be the most powerful in over 70 years and is projected to persist until at least February 2027.

El Niño is a natural climate phenomenon characterized by a warming of the central and eastern tropical Pacific Ocean, which alters global weather patterns. This shift can lead to drought in some regions while causing more intense typhoons and flooding in others. The current event is occurring against a backdrop of rising global temperatures due to human-induced climate change.

"El Niño is being supersized before our eyes. The science leaves no room for doubt: the planet is in uncharted waters, and those waters are heating up," Guterres stated. Governments and scientists are racing to implement measures to mitigate potential deaths, displacement, and environmental damage, including strengthening early warning systems and deploying pre-emptive medical assistance.

The WMO highlighted that El Niño has the potential to deliver a "massive blow to communities and economies across the world." The organization is actively working to disseminate forecasts of potential extreme weather events linked to El Niño to as many communities as possible.

Sea surface temperatures in the central and eastern tropical Pacific have risen sharply, a clear indicator of the strengthening El Niño. In key monitoring regions, temperatures have been more than 2°C above average, placing it on track to be classified as a very strong event. Forecasts suggest monthly sea surface temperatures could approach 4°C above average, potentially making this the strongest El Niño since at least 1950 by a significant margin. Even more exceptionally, subsurface temperatures in the Pacific have been recorded at over 8°C above average.

Above-normal sea temperatures are also anticipated in other parts of the world, including the Indian Ocean, the tropical Atlantic, and coastal areas of Australia. For Australia, with its rich marine ecosystems, these oceanic heat changes are a significant concern, particularly given recent marine heatwaves driven by climate change.

While forecasts suggest the Great Barrier Reef might be spared the most severe conditions this year, allowing coral some time to recover, southern Australia is expected to face significant impacts. Dr. Alistair Hobday, a chief researcher at Australia's science agency, noted that while El Niño is natural, it exacerbates the extreme heat conditions that drive disasters.

The WMO's mobilization efforts aim to provide communities with crucial information to prepare for the anticipated extreme weather. The combination of a powerful El Niño and ongoing climate change presents a complex and concerning outlook for global weather patterns and their societal and economic consequences.