LANHAM, Md. (WNEW) — Just three decades from now the District of Columbia and Annapolis will experience floods on a daily basis, sometimes twice a day, a recent report says.

A new study predicts that D.C., Annapolis and many other coastal cities in the U.S. will experience a major increase in flooding in 30 years, with as many as 400 floods per year.

The study from the Union of Concerned Scientists says that a rise in sea levels from global warming is the culprit causing floods that will threaten the East and Gulf Coasts.

“This flooding will redefine how and where people in affected areas live, work, and otherwise go about their daily lives,” the report states. “Coastal communities, and the nation as a whole, need to start planning today to cope with sea level rise and unprecedented tidal flooding, and to take swift and decisive action to limit longer-term damage to our coasts.”

Cities along the East Coast are already seeing a rise in sea level at especially fast rates, says the study, with some communities already seeing a fourfold increase in floods since 1970. Sea levels have also risen about eight inches globally in the past century.

Ocean City, Maryland will also get an increase in floods by 2045.

The findings are concerning because shores are more heavily developed than years past, so higher tides are also affecting more people and infrastructure.

For more information, read the full report.

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