IMHO, one of the OAS nations has to request aid, or be militarily/governmentally incapable of doing so. We had a bunch of US citizens in the medical school there.
This is a matter of urgency, where roving gangs are robbing, raping and terrorizing in the pitch dark. Send help now, debate jurisdicions later. When a ship is sinking is not the time to stand on the shore and debate which lifeboats have duty in that area.