Over the past several years there has been significant discourse across a broad spectrum of stakeholders addressing the significance of climate change and the associated risks relative to human inhabitation especially in dense population centers. Sea level rise, flooding and storms will impact our coastline cities in unfathomable ways. We will see dramatic changes taking place over the next half century as vast populations shift from coast cities inland or elsewhere. There once advantageous location on the ‘edge’ between land and sea that provides infrastructure, trade routes, natural ressources and recreational values is turning more and more into an uncalculable threat. Due to this shift the realtionship between the cities and their connection to the water have to be reinvented. At the very same time Re_Edge Cities, like all large urban areas, are faced with the pressures of rapid urbanization and have to absorb an ever growing influx of population over the next decades. Re_Edge Cities have unique yet intertwined histories and identites being linked and independent urban entities with diverse but evolving demographics and economies that provide a backdrop for speculative exploration. How can cities face these realties through a speculative investigation of new architectural prototypes based on a resilient approach to rising sea levels and urban growth, based on a coupling of new types of technologies with new programs?