A new study says much of Miami-Dade County will see the number of projected floods rise from 45 a year to 80 with a 10-inch rise in sea levels by 2030, and then accelerate to 380 instances of flooding a year by 2045.

The Union of Concerned Scientists (UCS) came up with the projections using new data compiled by the Army Corps of Engineers.

"In 2045, given normal variations in the tides, while some days would be flood-free, many days would see one or even two flood events‚ÄĒone with each high tide," UCS said in its report.

The findings jibe with another recent report from the University of Miami that since 2006, flooding in Miami Beach has soared 400% from high tides and 33% from rain.

The group created maps outlining their projections. Here's Miami Beach (the city's west side is lower-lying than its east):

And here's a highlighted section of the north side of the city of Miami:



Last week, the National Oceanic and Atmospheric Administration released new flood maps that factor in population growth projections. They found that sea rise could force millions in Florida to adapt or flee. Previous estimates have projected $2.5 billion in real estate is at risk from sea level rise.

‚ÄúIn terms of sheer number of people living in harm‚Äôs way [South Florida] is way at the top basically,‚ÄĚ Stetson University ecologist Jason Evans, one of three co-authors of the paper published in the journal Nature Climate Change, told the Miami Herald. ‚ÄúIt just pops out.‚ÄĚ

UCS calls on more state and federal support to support local investments already underway, though as I have reported, the former continues to ignore pleas from South Florida.


"Local action is not enough," UCS says.

Rob covers business, economics and the environment for Fusion. He previously worked at Business Insider. He grew up in Chicago.