“People talk about Australia being in the worst drought in 100 years,” Dr McGowan said.
“But what the evidence is showing us is that in the last 5000 years South-East Queensland has been much drier than at present.
From PhysOrg
But don't you go putting up desalination plants says the WWF:
Desalination: Option or distraction for a thirsty world?
Gland, Switzerland – Making drinking water out of sea water is a growing trend but a potential threat to the environment that could also exacerbate climate change, says WWF in a global review of desalination plants worldwide.
Here's the WWF report (53 page PDF)