'1 in 100 year event' doesn't mean it hasn't happened for 100...

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    '1 in 100 year event' doesn't mean it hasn't happened for 100 years. You might want to check what it actually means.

    http://www.bom.gov.au/water/designRainfalls/rainfallEvents/why100years.shtml

    The fact that such events are clearly becoming more frequent should concern you.
 
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