What drives sea level rise? US report warns of more frequent flooding
Sea levels are rising, and that will bring profound flood risks to large parts of the Gulf and Atlantic coasts over the next three decades.
A new report led by scientists at the National Oceanic and Atmospheric Administration warns that the U.S. should prepare for 10-12 inches of relative sea level rise on average in the next 30 years. The rise is due to both sinking land and global warming. And given the greenhouse emissions released so far, the country is unlikely to be able to avoid it.
That much sea level rise means cities like Miami that see nuisance flooding during high tides today will experience more damaging floods by midcentury. Nationally, the report expects moderate coastal flooding will occur 10 times as often by 2050. Without significant adaptations, high tides will more frequently pour into streets and disrupt coastal infrastructure, including ports that are essential for supply chains and the economy.