The main reason why the 2010-2011 floods happened in Queensland was, quite simply, because of the unusual amount of rain. Australia spends many years in drought, often caused by the El Niño effect....
The current floods in Brisbane (May 2009) have been the worst since the floods in 1974. By the time the 1974 floods abated, four days after they set in, 16 people had died, 300 had been injured, and...