What will happen to the Bay Islands is mere conjecture until after it passes.
What is not debatable is the fate of the Corn Islands.
Much as no one in the US understood that Mitch ('98) devastated Guanaja and pounded the Bay Islands, no one has cracked open the map and noticed the small resort diving islands that are directly in the path of Felix.
The Corn Islands are very low lying (no high ground) and will be exposed to the full ferocity of Felix before it makes landfall. Also look for Half Moon Key.
On the Bay Islands in 98, Mitch caused only five islander deaths that were directly linked to the storm. 12,000+ may have died on the mainland due to mudslides, etc, mostly in the more densely settled areas. Weeks later, I saw men excavating with shovels a Toyota Hilux that was buried 17 feet down in the mud. Life goes on.
The area which Felix looks to make landfall is the Cape of Honduras (aka: Gracias de Dios) which is a low lying, swampy area inhabited by the poorest of poor. They have no idea, other than through their native abilities, that this storm is coming. Even if they did, there is little that they can do.