Not trying to be a wet blanket here.
The Cape Hatteras Light Station was moved to protect it from "the threat of shoreline erosion, a natural process"
www.nps.gov
IE, "over a century of tides washing over the island, moving sand from oceanside to soundside, there was just 120 feet separating the lighthouse from the ocean."
Read more at Coastal Review,
coastalreview.org.
The Norfolk Sea Wall is to protect from storms, not rising oceans
The first piece of the wall, which includes the shoreline by Harbor Park, will range in height from about 6 1/2 feet to about 16 1/2 feet.
www.whro.org
Like you said any changes in ocean levels are natural and cyclic. Weather in naturally cyclic.
In the mid 1980's we were riding motorcycles in Montana all winter as there was no snow and it was close to spring temperatures.
As the 80's were coming to a close we had 40 below weather for 2 weeks in a row.
In the mid 2000's we were again in a warm spell which swung to cold at the end of the decade.