Sea levels are generally accepted to be rising worldwide, this is a simple matter of observation.

Discussion as to the cause or causes of this rise can provoke strong feelings and is arguably prohibited in these forums under the "no politics" rule.(not directly party political, I know, but close enough to avoid)

Whilst some might take the view that the observed rise is short term and may stop or reverse, it seems to me a reasonable assumption that the observed rise in sea levels will probably continue.

That leads to the conclusion that living in an area that is already very low lying and vulnerable to flooding is not the best long term choice.
No forbidden political argument is required to state that coastal flooding has increased in recent decades, and that if currents trends continue, that it will get worse still.