Australia's summer forecast: fair chance of disaster?
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The flooded Diamantina River around Birdsville, Australia, is seen from the air with the on March 28, 2011. Queensland suffered a series of extreme floods from December 2010 to January 2011, affecting more than 200,000 people across more than 70 towns. (Mark Kolbe/AFP/Getty Images)
La Nina, the weather system resulting from a cooling of the normal sea surface temperatures around the equatorial Pacific Ocean, responsible for last summer's heartache, is back this year.
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