Climate change threatens the economy of the United States through increased flooding and storm damage, climate-driven changes in crop yields, drought, disruptions in labor productivity, crime, and public health, and heat-related strains on energy systems. Michael Oppenheimer and Geoffrey Heal discuss their econometric research on human responses to climate, and explain private sector risk-assessment tools. Oppenheimer and Heal are contributors to the book Economic Risks of Climate Change: An American Prospectus