Around the world, cities are facing risks that impact their residents and business and the infrastructure, economy, environment and social structures they rely on. Unfortunately, in many cities these risks are growing or new risks are emerging due to climate change. Reducing these risks and developing climate resilient communities requires a multi-faceted approach that recognizes and addresses the complexities of communities and the multiple systems that come together to make cities great places to live, learn, work and play. Only through a focused, global initiative to create climate resilient cities can we hope to achieve a climate resilient earth. Cities, businesses, and civil society must join forces, before disasters strike, to build climate resilience, save lives, and protect critical infrastructure.