The huge Chinese diaspora in Perth are reported as preparing to possibly host the relatives, planning to host them in their homes if necessary, and identifying spaces for briefings, worship and counselling. I think the relatives will have a better experience in Australia if that comes about - partly of course because Malaysia is a much poorer country and Perth has of course had time to prepare, and Australia has a well organised disaster relief infrastructure and has planned for this sort of thing (not specific to an overseas disaster, but much of the planning would apply).