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.

Over the weekend, residents of Brisbane, Australia, were bracing for the impact of Tropical Cyclone Alfred. The storm was downgraded to a tropical low, and made landfall on the mainland on Saturday. It was the first storm of its kind in the area in 51 years.

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.