Four million people are in the firing line of Cyclone Alfred. It's expected to hit between the Sunshine Coast and the Gold Coast - a stretch of Australia known for its beautiful beaches and top surf – as well as Brisbane, Australia's third-biggest city.

Cyclone Alfred is unusual for two reasons — it has formed way too south, and is moving slowly. Both these factors make it more dangerous. We explain why.

Brisbane airport was closed as the centre of Alfred is expected to cross the coast very early Saturday morning, most likely between Noosa and Coolangatta of Queensland accordinng to Australia's Bureau