The president's Mar-a-Lago estate, the soaring apartment towers bearing his name on Miami-area beaches and his Doral golf course are all threatened by rising seas, according to projections from the National Oceanic and Atmospheric Administration and the South Florida Regional Climate Change Compact.
Severe damage may come sooner rather than later if the U.S. Abandons the international agreement aimed at curbing emissions of heat-trapping gases that cause climate change.
South Florida roadways already flood routinely during storms or unusually high "king tides," forcing cities to raise or move them and install expensive pumping systems.
"If the beaches are gone or the streets are flooded, it's going to affect the value of his property," Cason added. "So as a prudent businessman, he ought to conclude that the science is right and we need to prepare and plan."
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Nearby roads and bridges used to access the property would also be affected.
At some point this century, water is expected to completely cover many of the state's barrier islands, especially during storms.
Trump's beloved National Doral Miami golf course is inland, but it's still at risk. As seas rise and Florida's water table rises, state geologists predict that Florida's porous limestone geology will allow water to easily percolate upward, flooding inland and coastal areas alike. If the course isn't severely damaged by flooding, there will be more days when it's too swamped for golfers.
The president also has business interests in properties near the ocean in Vancouver, Canada; Panama City, Panama; Uruguay and Mumbai, India, according to the Trump Organization website.