Schools are closed, public transport has stopped and desperate residents are getting around shortages of sandbags by buying sacks of potting mix as a region of eastern Australia is lashed by wind and rain from a rare approaching tropical cyclone.

Millions of residents along Australia’s eastern coast are bracing for the arrival of a very slow-moving storm, the most southerly tropical cyclone to threaten the region in more than 50 years.

Residents are stacking sandbags to protect low-lying properties ahead of a tropical cyclone that is forecast to become the first in 51 years to hit the Australian east coast near Brisbane, the nation's third-most populous city.