A severe heatwave sweeping across much of Europe has heightened concerns about the disproportionate health risks posed to children and elderly populations. While public health campaigns often emphasize the vulnerabilities of older adults, recent incidents in France—such as the deaths of two children inside a car—highlight the dangers extreme heat presents to young children as well.

Scientists attribute the increasing frequency, intensity, and duration of heatwaves to human-driven climate change. Forecasts for the coming week indicate conditions might rival the devastating 2003 heatwave, which resulted in an estimated 70,000 deaths across Europe.

Both infants and elderly individuals are particularly susceptible to heat-related illness due to diminished ability to regulate body temperature and reduced sweating. According to the 2026 Europe report by the Lancet Countdown on health and climate change, heatwave exposure among people over 65 years old surged by 266 percent from 2015 to 2024 compared with the period between 1991 and 2000. Infants under one year of age saw a 121 percent increase in exposure.

French epidemiologist Noemie Letellier noted that older adults face heightened risks not only because of biological factors but also due to social conditions such as financial instability, isolation, and dependency. Jacques Boddaert, head of geriatrics at the Pitié-Salpêtrière University Hospital in Paris, explained that aging diminishes the body's ability to manage temperature, lowers the sensation of thirst, and delays recognition of dehydration symptoms. He also pointed to the added dangers posed by chronic illnesses common in older individuals and the use of medications such as diuretics, which can exacerbate heat-related health issues. Boddaert cautioned that summer holidays taken by caregivers can leave vulnerable seniors without adequate support during extreme heat episodes.

Letellier further emphasized the diversity within the elderly population, noting that economic hardship, illness, disability, and social isolation disproportionately affect some individuals. She highlighted that elderly women, often living alone with fewer resources, may face increased vulnerability.

Although fatalities among young children are less frequently attributed directly to heat, extreme temperatures can lead to a range of adverse health effects. Pregnant women are particularly at risk, with studies linking high heat exposure to preterm births and low birth weights. Research published in 2024 in the Journal of Climate Change and Health also associated extreme heat with higher rates of emergency department visits, asthma flare-ups, heat illness, and decreased school performance among children.

A 2023 Climate Central report underscored the growing threat, noting that climate change has at least doubled the average number of annual pregnancy heat-risk days worldwide over the past five years, spanning more than 200 countries. As Europe braces for continued sweltering conditions, public health experts warn of the urgent need to protect its most vulnerable populations from escalating heat-related dangers.