At this stage, they don't know when it will be possible to return to their home, but early indications are that it might not be for some time. Unfortunately, there's not a lot that can be done from this distance to relieve the situation.
Update: we have now spoken to one of the displaced cousins. Naturally they are finding the whole situation distressing. They're critical of the lack of warning they received and the general "unresponsiveness" of the authorities (notwithstanding that the TV images convey a different impression).