Wow! Thanks for posting that image with notations. I had not been to Galveston since I was a real little kid, and I don’t remember much about it. Seeing your map ‘splains it better for me.
The good news, if there is any, is that the eyewall winds at landfall, on both the front and back of the eye, were parallel to the long axis of the island. Breach and scour effects are most likely when wind and waves move across the island and transport sand, fill and foundations into the West Bay.