Climate change has already increased global temperatures, greatly increasing extremes. This will continue unless greenhouse gas emissions are reduced to “net-zero”. The 1.5°C target of the Paris Agreement requires emissions reductions of around 50% in the next 10 years. Newborn babies are particularly vulnerable to high temperatures. They have a limited ability to thermoregulate – or control their body temperature – and can easily become dangerously hot or cold. Older babies and toddlers can thermoregulate better. But they are often unable to communicate their temperature discomfort. They rely on caregivers to help them adjust clothing and change their environment –...