This may be a start...
http://www.aph.gov.au/house/members/
Find your member and the minister.
Tell them of your concerns in moderate language. Explain why you believe that public safety has had a net decrease since the implentation of the NAS.
Then explain that due to your qualifications in the industry, (whatever they are) that the email constitutes Notice. Notice of an impending disaster. Most of them are lawyers so they will know the ramifications of that.
Then tell them that should the unthinkable occur, you will be sending a dated copy of the email to the relevant media organisations, so they cannot say they weren't warned.
As I said, it is a start.