NSW weather live updates: Lismore, Coraki evacuated as Sydney rain eases

Sydney’s weather is set to ease on Wednesday but the State Emergency Service is still bracing for the possibility of severe thunderstorms and flooding.

Sydney’s weather is set to ease on Wednesday but the State Emergency Service is still bracing for the possibility of severe thunderstorms and flooding.

Warragamba Dam was predicted to spill, at its water volume capacity of 2,027,000 ML as of Tuesday morning. Flood warnings remain in place for the Colo River and Hawkesbury due to the danger.

Further north, communities already devastated by floods earlier this month have been hit with another deluge,  forcing residents of Lismore, Coraki and Tumbulgum to evacuate on Tuesday evening as river levels rise.

The Bureau of Meteorology warns across the Northern Rivers, Mid North Coast and parts of the Northern Tablelands localised flash flooding is possible, with six-hourly rainfall totals reaching up to 300mm.

The NSW State Emergency Service (SES) have received a total of 660 requests for assistance – at this stage they include supplying sandbags, repairing leaking roofs and conducting flood rescues for vehicles that drove through floodwaters.

The state's north has copped a greater deluge of rain over the past week than any other part of Australia, with Port Macquarie recording the country's highest weekly rainfall total at 264.2 mm.

For those only just beginning the clean-up from flooding in late April and early March, the second rain bomb is "incredibly bitter".