The company says damage to its assets and inventory has been minor.
Despite the hit to its earnings, Orica is maintaining its previous earnings guidance, subject to further bad weather.
The company has previously said it expects to post a higher net profit after tax for 2011 when compared to 2010.
Orica posted a NPAT of $1.31 billion, a huge $777 million increase on the previous year.
If the company achieves its guidance, it will be the 10th successive year of profit growth.
Orica has more than 14,000 employees in 50 countries.
Shares in Orica closed 26c up yesterday to $25.51.
