The environmental, economic, and social dimensions are often identified as the three pillars of sustainable development. Urban population rise, globalization of economies, and the hazardous environments that transcend the traditional city limits pose new challenges to future city governance. The outdated administrative government systems must be re-evaluated whether a structured, pre-defined, fixed boundary city-regions or whether a more flexible strategy involving cooperation in spatial structures outside of the traditional city limits is more appropriate for achieving resilience and sustainability. Can cities become resilient and sustainable within predefined borders or must these borders extend and to what degrees in order to maintain certain levels of cooperation? Can suitable resilience and sustainability indicators be found to address the issues and can their measures be quantified for the purpose of arriving at acceptable compromises? To what extent can volcanic eruptions, earthquakes, flooding, or other hazardous sources affect the development of resilient and sustainable cities? And to what extent are the city-region interaction, flexibility of administrative units, and establishment of science-policy competence required to build sustainable governance and how can such cooperation be achieved? This session calls for the critical discussions of the issues facing the future governance of cities in hazardous environments.