The study examined global heat-related mortality during El Niño years. It covered populations worldwide, grouped into regions by Human Development Index. Epidemiological methods were used to estimate heat-related deaths in very strong El Niño years. Heat-related mortality was estimated to increase by 29% in these years. The greatest burdens fell in low- and medium-Human Development Index regions. The results are estimates, which the authors say only suggest this pattern.
Why it is interesting: It estimates how a recurring climate pattern relates to heat deaths worldwide. The estimated burden is greatest in low- and medium-Human Development Index regions.
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