Climate change is a global health emergency. We are already seeing the harmful health impacts of climate change. Children, the elderly, low-income communities, and communities of color are disproportionately impacted - climate change exacerbates health inequities. We know what we need to do to chart a new course to prevent catastrophic climate change: stop burning coal, oil, and gas, as quickly as possible. But time is short. We urgently need to take action to transform our transportation and land use, energy, community infrastructure, and food systems to support a just transition that offers hope to our children for healthy people, healthy places, and a healthy planet. Health professionals must speak out for a healthy future.