The main effect causing trouble is always going to be sediment diversions.
Otherwise, even rising sea levels (which will happen regardless) would be compensated by more sediment deposits.
Exactly, unless the phrase “climate change” is grossly expanded to include what has happened upstream in the Missouri and Mississippi River valleys, this is NOT a climate change issue.
Subsidence of the Delta islands has been a well-documented occurrence tied directly to the lessened silt loading of the Mississippi. This is old news, but the Left is oblivious to facts and prefers theories and unicorns.