A pressing need exists to understand how, when, and why to adjust and build upon urban environmental policies that can influence a city’s capacity to foster and enact climate adaptation and mitigation. The objective of this book has been to define what we can learn from past urban environmental crises and resulting policy transitions that might be applicable to understand how climate change will manifest as crises in cities and what can be done to help accelerate urban climate action. In this chapter, we more directly turn our attention to learning what the book’s case studies reveal about these objectives. The case studies illustrate how existing urban environmental practices can be adjusted and enhanced to better grapple with the challenges of climate change. The analysis provides the groundwork for a set of innovative recommendations on how to perceive the urban climate crisis and how to consider new urban climate change policies. A key overall conclusion is that we should do all we can to learn from previous urban environmental crises as they will continue to inform us moving into the future.