Maps show coastal and low-lying areas that would be permanently flooded, without engineered protection, in three levels of higher seas. Percentages are the portion of dry, habitable land within the city limits of places listed that would be permanently submerged.

Baltimore 0% 1% 5% 12% flooded Land around the many Patapsco River inlets is flooded. Fells Point and the city's ports are submerged. Flooding extends over much of downtown and many waterfront communities, like Dundalk.

Boston Boston

0% 9% 24% 37% flooded Cambridge

0% 26% 51% 86% flooded Logan Airport starts to disappear. Boston Harbor begins to encroach on downtown; the Charles River floods southern Cambridge. Back Bay, the South End and the airport are permanently submerged. What’s left of downtown is an island. The downtown island shrinks to mostly Beacon Hill. Many shore communities are flooded.

Charleston, S.C. 0% 19% 42% 80% flooded The Atlantic coast pushes several miles inland. Much of the original city and its ports are flooded. The coast moves up to 10 miles inland. The old city is submerged.

Houston Houston

0% 0% 1% 5% flooded Galveston

0% 68% 97% 100% flooded Barrier islands in the Gulf of Mexico are mostly covered. Galveston Bay laps at the Johnson Space Center; Galveston is submerged. The Space Center and the vast industrial zone along the Houston Ship Channel are inundated; the sea moves inland as much as 15 miles.

Jacksonville, Fla. 0% 3% 17% 56% flooded Much of the region's low-lying wetlands disappear. The Atlantic coast moves about 4 miles inland; downtown begins to flood. Most of the built-up areas in the city are submerged.

Los Angeles area Los Angeles

0% 1% 2% 3% flooded Long Beach

0% 7% 20% 45% flooded Huntington Beach

0% 27% 50% 72% flooded Low coastal areas, like the Seal Beach National Wildlife Refuge, disappear. The Port of Long Beach is permanently submerged. In much of Long Beach and Huntington Beach, the Pacific moves up to four miles inland.

Long Island 0% 5% 12% 21% flooded Barrier islands start to submerge; other islands in Middle and East Bays disappear. Shore of main island moves inland. Portions of North and South Forks flood, turning remaining land to islands. All barrier islands gone. The southern shore has moved one to five miles inland in most places.

Miami Miami

0% 20% 73% 99% flooded Miami Beach

0% 94% 100% 100% flooded Much of suburban Miami and the area’s barrier islands, including Miami Beach, are submerged. Miami is reduced to small islands; the downtown district is mostly flooded. Miami Beach is gone.

The entire metropolitan area is permanently flooded.

Mobile, Ala. 0% 4% 19% 36% flooded The vast Mobile delta wilderness is flooded. Downtown starts to flood, as does much of southern Mobile. Downtown is inundated. Mobile Bay is several miles wider.

New Jersey Atlantic City

0% 62% 97% 100% flooded Newark

0% 2% 35% 52% flooded Jersey City

0% 20% 46% 62% flooded Barrier islands start to disappear, much of Atlantic City and the Meadowlands are flooded, and the mainland shrinks a mile or more in places. Most of the Cape May peninsula is gone. Port Newark and Newark International Airport flood. Downtown Newark, downtown Jersey City, Atlantic City, most of the state's coastal towns and the Cape May peninsula are all gone.

New Orleans 0% 88% 98% 100% flooded If levees breach, almost all of the city would flood. The surrounding region is also mostly flooded. Every community in the delta region is swamped. The gulf shore advances to Interstate 12.

New York City 0% 7% 22% 39% flooded The East River starts to eat away at La Guardia Airport. Port complexes are flooded. La Guardia and John F. Kennedy airports are permanently submerged, as are Coney Island, the Rockaways and neighborhoods along Jamaica Bay. Large portions of all five boroughs are gone, including much of Manhattan below 34th Street.

Northern California San Francisco

0% 6% 11% 19% flooded Sacramento

0% 4% 27% 62% flooded Flooding in low-lying estuaries of San Francisco Bay and, if levees fail, the expansive Sacramento-San Joaquin River delta. Northern and southern sections of Sacramento flood. Nearly two-thirds of Sacramento, including downtown, is inundated.

Philadelphia 0% 1% 6% 21% flooded Some flooding close to the Delaware River. Philadelphia International Airport is largely swamped. Much of the historic district and South Philadelphia are submerged, as is the vast refinery complex along the Schuylkill. The Delaware swells to five miles wide.

Portland, Me. 0% 3% 6% 16% flooded Prouts Neck becomes an island. Flooding of wharf areas. Water encroaches on parts of the downtown district and much of South Portland.

Portland, Ore. 0% 3% 8% 16% flooded The Columbia River swells and floods natural habitats like the Ridgefield National Wildlife Refuge. Portland International Airport floods. The Columbia shaves two miles off the north side of Portland.

Providence, R.I. 0% 1% 6% 13% flooded Flooding along Narragansett Bay inlets. Downtown Providence begins to flood. A larger section of the downtown area is under water.

San Diego 0% 0% 3% 6% flooded Minor flooding. San Diego International Airport is largely underwater. San Diego Bay encroaches on downtown and ports. Coronado Island is mostly gone.

Savannah, Ga. 0% 8% 40% 87% flooded Widespread flooding of estuaries along the Atlantic coast. Savannah is reduced to several islands. Most of the region is under water, with only small sections of Savannah spared.

Seattle Seattle

0% 4% 9% 13% flooded Tacoma

0% 10% 13% 14% flooded River deltas in Tacoma, Everett and Seattle flood. The Duwamish Waterway in Seattle, lined with ports and industry, swells to a mile wide or more. Much of the large suburb of Kent is flooded.

Tampa Bay area Tampa

0% 18% 32% 50% flooded St. Petersburg

0% 32% 49% 70% flooded Tampa Bay pushes inland one to four miles and eats away at MacDill Air Force Base. Beach communities flood. MacDill and most of the peninsula it sits on disappear. Downtown Tampa, Tampa International Airport and Tarpon Springs are swamped. Parts of Clearwater survive on an island; St. Petersburg is reduced to a smaller island.

Virginia Beach-Norfolk Norfolk

0% 9% 78% 100% flooded Virginia Beach

0% 21% 63% 99% flooded Newport News

0% 8% 16% 39% flooded Large areas of low coastal wetlands disappear. Downtown Norfolk and many of the area's military installations are under water. Most of the region is permanently submerged.

Washington 0% 2% 7% 14% flooded Riverfront areas flood, including a portion of Bolling Air Force Base. Reagan National Airport and the National Mall begin to submerge. Much of central Washington below Constitution Avenue is inundated, as are National Airport and parts of Old Town Alexandria.