.Publisheru00e2 $ s note Springer Attribute continues to be neutral for administrative claims in posted maps and institutional affiliations.This is a summary of: Hanson, C. et al. A time-stratified, caseu00e2 $ "crossover study of heat energy exposure and perinatal mortality from 16 health centers in sub-Saharan Africa. Nat. Med. https://doi.org/10.1038/s41591-024-03245-7 (2024 ).