Recent extreme weather events in California—wildfires, droughts, and flooding—make abundantly clear the need to plan effective responses to both the causes and consequences of climate change. New Mineta Transportation Institute (MTI) research, Harmonizing Climate Change Mitigation and Adaptation in Transportation and Land-Use Planning in California Cities, analyzes the climate plans for 23 California cities in addition to interviewing 25 local, regional, and state officials working on climate planning. Identifying transportation and land-use (TLU) strategies that both mitigate greenhouse gas emissions and successfully prepare communities to be less severely impacted by climate change remains a challenge. The study assessed existing city plans and identifies the potential pitfalls between mitigation and adaptation. Then, it establishes methods the state can implement to help cities effectively incorporate integrated TLU actions.