A thermometer for the world's youngest: UN agencies launch heat-health tracking for mothers and babies

Extreme heat harms the youngest first — and until now, countries had no shared way to count how. The World Health Organization, the World Meteorological Organization, UNICEF and the UN Population Fund have launched the first set of priority indicators for tracking heat's effects on pregnant women, newborns and children: preterm births, stillbirths, low birthweight, pregnancy hypertension, child deaths and clinic visits during heatwaves, even school attendance. The science behind it is stark — heat exposure raises the odds of preterm birth by about 26%, babies under one experienced 389% more heatwave days in 2024 than in the late twentieth century, and an estimated 1.5 billion children are exposed to heatwaves. What gets measured gets managed: the framework is built to strengthen preparedness and speed up responses when the next heatwave lands.

SDG 3 · Good health and well-being — Mechanism: institutional program