Many health care professionals are already dealing with the effects of climate change. In this Q&A, the World Health Organization’s first-ever Special Envoy for Climate Change and Health, Vanessa Kerry, MD, MSc, joins JAMA Medical News Director Jennifer Abbasi to discuss how a changing climate and extreme weather events are impacting human health, what clinicians should expect in the years ahead, and how they can help protect patients—and the planet. Related Content: Critical Care Physician Takes on Climate Change in New WHO Role Climate Change and Health