El Niño Could Cause 450,000 More Heat-Related Deaths, Study Says

The striking element here is attribution: a single climate oscillation being tied to a measurable death toll, rather than to crop or energy effects where El Niño is usually discussed. That reframes the phenomenon from an agricultural and commodity story into a public-health and sovereign-risk one, relevant to insurers, reinsurers and catastrophe-bond holders pricing heat mortality. The open question is whether such mortality estimates become a standard input in climate risk models — and whether El Niño's expected persistence through February keeps the issue live.