Yes, it is called "over wash".
The much larger than average waves (and temporary high water level) literally push the beach sand into the back bay (or Lagoon).
Cumulatively, over time that is what is responsible for the long shallow points in the Lagoon.
https://coastal.er.usgs.gov/hurrican...s/breachLG.jpg
Hopefully, this storm won't be strong enough to do much of that!