Q: When and how was the floods discovered in Austrailia?

A: One morning, they noticed that, where there once was nothing but sand and dessert, there was now a large puddle. They thought nothing of it an returned to drinking.

Later, they noticed that, instead of sinking into the ground as they assumed it would, the puddle had grown, and now covered everything and rose to their knees. They canceled their rugby match and got back to drinking.

Eventually, they noticed the puddle had continued to grow, had drowned all the livestock, destroyed many houses, and ruined all the cars. Suspecting that the water might not be going anywhere, and would soon start drowning people, they grabbed every available scrap of wood, constructed a boat, and set sail on a Booze Cruise that continues to this day.