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.

Tropical Cyclone Alfred weakened into a tropical low Saturday as it neared Brisbane, Australia, bringing heavy rain and flooding risks to the region, according to officials. Initially expected to make landfall as the first cyclone to strike southeast Queensland since 1974, Alfred's winds dropped to under 39 mph (63 kph) as it shifted inland.

The maps show the predicted flood extent for the most at-risk areas of Brisbane, based on Bureau of Meteorology forecasts.