Grand Island - Grand Isle.
I expect Grand Isle to be scoured clean of all habitation. That means all houses and other man-made structures, humans and animals. and pretty much all vegetation.
My family went through Camille, I saw what happened to Ship Island and Cat Island, just as I describecd above. The only structure to survive was the fort on Ship Island and that was severely damaged and also almost covered by sand.
About a century ago my family lost everything on Dauphin Island, just as I described above. Crushed flat as a pancake or wiped clean.
Sad but true.
Prayers for those who choose to take the risk.
Hey I lived on my sailboat at Bay St. Louis and Pass Christian for two years. I worked a Mississippi Army Ammo Plant.
Do you still have family in NO?
Dauphin Island is a beautiful place. My hubby's band once played for the Ala. Road Builder's Convention at the Grand Isle Hotel there. It was a fun evening and even the concert pianist ended up playing "Rocky Top" with the Bluegrass band, and the road builders covered their formal dress with Lower Forty Grass T-shirts. Those were good times, long ago.