The climate crisis is the defining human and child's rights challenge of this generation, and is already having a devastating impact on the well-being of children globally. Understanding where and how children are uniquely vulnerable to this crisis is crucial in responding to it. The Children's Climate Risk Index provides the first comprehensive view of children's exposure and vulnerability to the impacts of climate change to help prioritize action for those most at risk and ultimately ensure today's children inherit a liveable planet. Utilizing high-resolution geographical data, this report provides new global evidence on how many children are currently exposed to a variety of climate and environmental hazards, shocks and stresses. Children's lack of access to essential services, such as in health, nutrition, education and social protection, makes them particularly susceptible. This report combines this growing body of new evidence with data on children's vulnerability to introduce the first comprehensive view of climate risk from a child's perspective.