ST. AUGUSTINE, Fla. — America’s oldest city is slowly drowning.

St. Augustine’s centuries-old Spanish fortress sits feet from the encroaching Atlantic, whose waters already flood the city’s narrow streets about 10 times a year — a problem worsening as sea levels rise. The city relies on tourism, but visitors might someday have to wear waders at high tide.

“If you want to benefit from the fact we’ve been here for 450 years, you have the responsibility to look forward to the next 450,” said Bill Hamilton, whose family has lived in the city since the 1950s. “Is St. Augustine even going to be here? We owe it to the people coming after us to leave the city in good shape.”

St. Augustine is one of many chronically flooded communities along Florida’s coast, and officials in these diverse places share a concern: They’re afraid their buildings and economies will be further inundated by rising seas in just a couple of decades. The effects are a daily reality in much of Florida. Drinking water wells are fouled by seawater. Higher tides and storm surges make for more frequent road flooding from Jacksonville to Key West — and they’re overburdening aging flood-control systems.

But the state has yet to offer a clear plan or coordination to address what local officials across Florida’s coast see as a slow-moving emergency. Republican Gov. Rick Scott is skeptical of man-made climate change and has put aside the task of preparing for sea level rise, an Associated Press review of thousands of emails and documents pertaining to the state’s preparations for rising seas found.

Despite warnings from water experts and climate scientists, skepticism over sea level projections and climate change science has hampered planning efforts at all levels of government, the records showed. Florida’s environmental agencies under Scott have been downsized, making them less effective at coordinating sea level rise planning in the state, documents showed.