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The history of growth of cities and urban changes has left with it many footprints in different trajectories. The growth of large and medium cities in Nigeria overtime has resulted in sharp urban segregation between formal and informal areas. Next to the large and medium cities are the pockets of slums and unplanned informal settlements on the outskirts of large cities. The proliferation of urban slums in cities is exacerbated by the concentration of high population of urban poor in over-crowded living spaces in rapidly changing urban areas. Urban changes manifest in the changes of population, demography and livelihood characteristics of cities. These changes are the main factors that influence adaptive capacity of city dwellers and their vulnerability to climate change. Urban changes and their accompanying changes in the population, demographic and livelihood characteristics in Nigerian cities present both …