This book presents and discusses a strategy which includes four approaches to dealing with the risk of sea-level rise and other water hazards. It also offers opportunities for cities to explore urban extensions such as marine estates, aquatic food production systems, new sea related industries, maritime transport developments, new oceanic tourist attractions, and the designation of additional coastal ecological zones. The urban interface between Sea and Cities generates, therefore, both burning issues and valuable opportunities and raises the question of whether it is possible to solve the former by exploiting the latter?