Climate change is a public health emergency. Evidence that a mass extinction is underway, that global ecosystem productivity is deteriorating, and that the biosphere is damaged by human actions continues to accumulate. This review aims to provide a summary of the health consequences of climate destabilization, which include heat-related illness and death, wildfires with air pollution, floods, droughts, water scarcity, increased frequency of intense storms, reduction in agricultural and seafood harvests, spread of infectious diseases, and higher rates of mental illness.