Well, the plan in question is more of what we're supposed to do. Not a thing about what they are going to do. I would assume the plan would be to get supplies and help to any of the other islands that haven't been hit. The island that was hit will just be written off as a loss (as any triage would do) and quarantined.
However, I imagine it'll be like an Italian cruise liner accident. The crew (government) will be they first info the life rafts and the passengers (us) will still be on the deck, waiting for instructions.