Stabilize the population, find funding, get the river of materials flowing past the craftsmen and up into code compliant building shells, cap any looters that jam up the works.
The real trick is getting the locals to wait on water and food till the roads are opened back up. That’s where the helo carrierS come in, but I’m not sure if these small islands actually have those, as opposed to just their basic fleet of Nimitz class units.
Dominica gained its independence from Britain. I don’t think Dominica has the where with all to do what needs to be done. Does Britain even have carriers available for the BVIs and Dominica?