In 2016, Melbourne experienced the world's largest epidemic thunderstorm asthma event which killed 10 Australians.

On 23 March 2007 a collision occurred in Melbourne's Burnley Tunnel would affect the psyche of the state. The crash involved multiple trucks and cars setting off an explosion hot enough to melt cars.

A group of friends boarded a small boat on Sydney Harbour which would change their lives forever. Six of them were killed when their boat collided with a fishing boat in the early hours of the morning.