With an extended period of draught and resulting water shortage which also will impact their agriculture they would be a whole lots better off by investing in huge desalination projects which could be powered by solar power as they have plenty of sunshine.
As far as water conservation is concerned they could take a few lessons from the Israelis, who would be more than willing to furnish the blue prints for huge hydroponic growth centers, which use minimal amounts of water and at the same time raise fish as well as a byproduct.
Not only that but it also would produce many jobs in regards to maintenance, growing procedures and shipping. But well before something like this would be implemented conditions will have to get lots worse before anyone sees the light, and I have a feeling that we are headed this way.
I like it!