It would be very unusual for a city's headlands to be literally miles above solid ground, especially for the carribean, which is extremely shallow (hence the hurricanes).
Take a look at the Florida keys, where you can find bedrock after a couple of meters. You can even go out a mile into the sea and hit bedrock after 6-8 meters:
> especially for the carribean, which is extremely shallow (hence the hurricanes)
The Caribbean is nowhere near shallow, take a look at a marine chart or just the seafloor topography on google maps. The Caribbean is thousands (often over 10K) of feet deep in most areas.
Also, this has nothing to do with hurricanes, which originate off the west coast of Africa.
Take a look at the Florida keys, where you can find bedrock after a couple of meters. You can even go out a mile into the sea and hit bedrock after 6-8 meters:
https://pubs.usgs.gov/pp/2007/1751/professional-paper/figure...