Cities are at the forefront of the fight against climate change. They are often located in areas that are vulnerable to the effects of climate change; however, they also bring together people and organizations that can work together to find solutions. In addition to decarbonization, cities will have to adapt to avoid or mitigate the worst effects of a changing climate. Research from McKinsey and C40 Cities provides a roadmap for city leaders and the private sector to take action through decarbonization and adaptation. In a recent joint report, we identified 15 high-potential actions that cities can take – some that help cities improve their overall resilience and others that address specific climate hazards such as heat, drought, inland flooding, coastal flooding, and hurricanes. During this event, city leaders will join private sector thought leaders to discuss collaborative action to protect communities and build resilient cities.