Annapolis, Maryland: Sea level is rising faster along the East Coast than in many places. In Annapolis, tides can cause the Chesapeake Bay to flood the city.

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Seattle, Washington: King tides sometimes cause Puget Sound to rise to discomforting levels in Seattle, as is shown here in 2011.

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AP Photo/Elaine Thompson

Boston, Massachusetts: Boston set a new record for the number of flooding days the city experienced in 2017, with higher sea levels making high tide flooding more common, especially when storms were in the area.

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AP Photo/Bill Sikes

Miami, Florida: Miami and other cities in Florida are experiencing some of the most severe sea level rise and tidal flooding.

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Miami, Florida: In the last 10 years, flooding events have increased in frequency by 400% in Florida.

Miami king tide flooding
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In Miami, the sea level has risen about 10 inches from 1900 to today. But it's expected that sea level there will be up to 17 inches higher than 1900 by 2030 and 86 inches higher than 1900 by the end of this century. Some geologists think those projections are far too low.

Galveston, Texas: Galveston set another record for most flooding days in 2017, along with Boston; Sabine Pass, Texas; and Atlantic City and Sandy Hook in New Jersey.

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Dwight C. CM/ELD/JDP/REUTERS

Miami Beach, Florida: Miami Beach is trying to engineer solutions to sea level rise, installing pumps and raising roads and buildings.

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Miami Beach, Florida: Many experts think much of South Florida will be underwater by the end of the century, especially if global emissions aren't rapidly cut.

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Hollywood, Florida: People often have to navigate flooded roads in Florida.

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AP Photo/Lynne Sladky

Broad Channel, Queens, New York: In parts of New York City, tidal flooding fills the streets once a month, sometimes more frequently.

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NYC Department of City Planning

San Francisco, California: Many places haven't seen dramatic flooding yet, but high tides combined with recent weather show how quickly waters can spill over the walls.

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AP Photo/Jeff Chiu

Norfolk, Virginia: Floods in the Norfolk and Hampton Roads area threaten to make the largest naval base in the world inaccessible.

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Hampton Roads, Virginia: It's possible that the base — and the jobs that come with it — will have to be moved.

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Hampton, New Hampshire: Some neighborhoods and cities can be protected for a time with environmental restoration procedures or engineering solutions. But in other places, people will eventually have to retreat.

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AP Photo/Jim Cole