The U.S. National Oceanic and Atmospheric Administration (NOAA) and climate scientists warn that a "Super El Niño" could bring historic weather to the Americas.

This atmospheric event is significant because it threatens to trigger a cascade of extreme weather patterns, including historic rainfall and severe droughts, across North, Central, and South America. The convergence of anomalous Pacific Ocean warming and intensifying climate change increases the likelihood of a high-magnitude event.

According to NOAA models, there is a 96% probability [1] that this super El Niño will remain active toward the end of 2026. Experts, including scientists from the National Autonomous University of Mexico (UNAM), said the phenomenon may have formed in mid-May 2026 [2].

The event is expected to reach its peak intensity between September and October 2026 [2]. This window of maximum activity could result in more intense cyclones, heatwaves, and flooding across the region. Experts said the warming of the Pacific is the primary driver of these shifts.

Regions in Mexico and throughout the Americas are particularly vulnerable to the resulting instability. The potential for simultaneous disasters, such as extreme flooding in some areas and severe drought in others, poses a risk to infrastructure and agriculture.

While some reports previously noted a cooler La Niña phase in 2025, current data focuses on the 2026 warming trend. The NOAA models suggest the active phase will likely persist until the close of the year [1].

“"The models of the National Oceanic and Atmospheric Administration (NOAA) assign a probability of 96% that the so-called super 'El Niño' will be active towards the end of 2026."”

A 'Super El Niño' represents a more extreme version of the standard warming pattern in the eastern Pacific. When combined with existing global warming trends, the resulting weather volatility can overwhelm traditional disaster preparedness. The predicted peak in late 2026 suggests that governments in the Americas may face simultaneous crises of water scarcity and catastrophic flooding, complicating regional resource management and food security.