Large parts of greater Sydney have been subsumed in flood water after a torrential downpour overnight. Thousands of people are under evacuation orders as authorities warn that the rains are likely to continue  be worse than previous years. 'If you were safe in 2021 do not assume you will be safe tonight,' said Steph Cooke, minister for emergency services and resilience. Twenty people were killed in March when the area was hit by flash floods