Cities are not only vulnerable from socio-economic pressures but also from their environments when significant deviations from status quo occur. An earthquake, volcanic eruption, tornado, hurricane, typhoon, or tsunami cannot only produce significant damage to city structures and its supply routes, but also generate loss of life, socio-economic discontents, and governance crises. The complacency of humanity increases its vulnerability and all too often leads to tragedies and shortly after a return to complacency without taking steps to prevent similar tragedies in the future. Emissions of dangerous carcinogenic chemicals and radioactive elements from an improperly managed landfill into the air and water systems can last for decades and centuries after the landfill stops receiving new waste, improper handling of hospital waste can produce biologic and radioactive health problems for decades and longer, and the locations of nuclear facilities close to geologic faults and being subjected to regulatory capture cannot only make the cities but also their surrounding communities uninhabitable. Professional vulnerability assessments of city habitats and infrastructure pave the ways for building more resilient and sustainable cities and this session calls for the presentations that address these issues for the purpose of constructing proper urban plans and building safer city environments. This is a preparatory session to the sessions dealing with resilient and sustainable urban planning strategies and construction of habitats and infrastructure.