The Bureau of Metrology predicts possible extreme summer weather

Right on cue the fires have been flaring this afternoon there's been an emergency alert for a fire on Tasmania’s east coast and there's a catastrophic warning still in place for the New South Wales far south coast region we'll get to the detail of that in a moment. But first after this El Nino declaration in the last few hours here's national weather reporter Tyne Logan explaining how El Nino works and what it means for Australia.