In this paper, by applying a Computable General Equilibrium model for Western Australia (called WAG), the impact of the 2002 dry season on the State’s wider economy is quantitatively analysed. An estimate of 40 percent loss in the production of five major groups of agricultural commodities is simulated into the model. The model results show that the State’s economy-wide total production declines by 2.3 percent. In 2001-02 dollar terms this production decline is worth more than $2.5 billion. The gross state product (GSP) for WA declines by more than one percent. The total value of the State’s exports and employment decline by 5.2 and 1.7 percent respectively.