In just three decades, more than 570 coastal cities will face a projected rise in sea level of at least 0.5 meters, putting more than 800 million people at risk, according to data collected by the C40, which brings together a network of cities in the world committed to ecological transition. Especially since, as that water level rises, the storms will become increasingly virulent. In fact, the increase in extreme weather events such as hurricanes or cyclones is a reality that breaks records every year and has a significant social and economic impact.
According to the UCCRN, a research network that brings together climate scientists from around the world, the economic costs to cities from rising sea levels and flooding could reach a trillion dollars each year by mid-century, the equivalent to the annual Spanish GDP. An estimate that they also estimate conservative, since, for example, Hurricane Sandy in 2012 alone damaged 90,000 buildings in New York, causing 19,000 million dollars in repairs."