In this new position paper, 'Changing Cities in a Changing Climate', DNV GL presents SURF, the 'Systems and Urban Resilience Framework.' SURF is a methodology for building the resilience of cities to climate-related disruptions. We examine urban areas from the perspective of their ecological system, structural system, socioeconomic system and governance system. Using this framework, we combine systems thinking, simulation and data to devise tools that help communities adapt and build resilience to climate change.