Experiencing extreme heat during pregnancy is linked to higher risks for babies, including preterm birth, stillbirth, and low birth weight. Pregnant women may also face higher risks of high blood pressure. Children also can become ill during extreme heat. WHO, WMO, UNICEF and UNFPA have identified key indicators to help countries spot these risks using data they already collect — such as preterm births, clinic visits, deaths and school attendance — alongside heat exposure data. Measuring the health impacts of heat means, we can act sooner to protect those most at risk: bit.ly/4zLTLEh