Scientists using climate modeling predict that a potential “super El Niño” could lead to substantial mortality, with one estimate placing the death toll at up to 451,000. The projection comes from researchers at the University of Chicago, who run climate models to assess how extreme ocean-and-weather patterns could translate into health impacts.

The reports describe the findings as a warning that the combination of stronger-than-usual El Niño conditions and knock-on effects could create serious risks, particularly where communities are more vulnerable to climate-driven shocks. The outlets also highlight calls for urgent preparation and action to reduce harm, framing the estimate as a basis for planning rather than a certainty. The coverage largely aligns on the central figure and the modeling approach, with little additional detail on assumptions or geography differences across reports.