Deadly floodwaters triggered by record rainfall in Australia’s northeast rose for a third day Monday as authorities warned flood-stricken communities to brace themselves for further destruction.

Six storms around Australia and its territories are expected to strengthen in the coming days, with one system likely to trigger life-threatening flooding in the nation’s north and three others with at least a moderate chance to form into tropical cyclones by Monday.

Fast-moving floodwaters rose Monday in northeastern Australia after forcing many to flee, blacking out homes, and sweeping away a chunk of a critical bridge.