Europe faced an unprecedented heatwave in late May, with temperatures soaring 10°C to 15°C above average. A study highlights the vulnerability of pregnant individuals and newborns to high temperatures, linking heat to increased premature births. Spain recorded the highest rate of preterm births, while Switzerland had the lowest. Factors like climate and socio-economic status influence this vulnerability, with young single mothers at greater risk. Heat can trigger early labor by raising body temperature and causing dehydration, affecting fetal development.