Rising temperatures could have a chilling impact on young children

Children, who are suffering from gastroenteritis due to hot weather, receive treatment at a hospital in Hyderabad, Pakistan, Thursday, May 23, 2024. Doctors were treating hundreds of victims of heatstroke at various hospitals across Pakistan on Thursday after an intense spell of the heatwave began in the country, and the mercury rose to above normal due to climate change, officials said. (AP Photo/Pervez Masih)

Young children really struggle in the heat. Their bodies are too small to cool down by sweating, like adults. And they’re wholly reliant on grown-ups to find any kind of relief, be it air conditioning or shade or a cool drink. Now, new research points to a potentially lifelong setback for little ones exposed to extreme heat, which is becoming more common due to climate change.

In a study of nearly 20,000 kids, young children who experienced hotter temperatures than usual were less likely to meet basic developmental milestones than those living in nearby, but slightly cooler areas, researchers report in the Journal of Child Psychology and Psychiatry. Children in lower-income households and urban areas were especially vulnerable.

“Early childhood is a sensitive period of development,” says Jorge Cuartas, a researcher at New York University who led the study. “If we experience excessive stress without a buffer, that can lead to long-lasting impacts on brain and skill development.”