
More than 300 residents on the south coast of NSW were forced to urgently evacuate overnight with rising flood waters expected to become more severe.

SES evacuated more than 300 people from eights streets in Sussex Inlet and in St George Basin overnight telling them to take photos, momentos, spare clothing and sleeping bags to the evacuation centres.

'Do not delay your evacuation. Roads may become be congested or closed. You could become trapped and need rescue.' SES announced just after 10.30 pm on Tuesday.

It comes after the Jerrara Dam in NSW was pictured overflowing and causing extensive flooding just hours after residents living downstream were also ordered to evacuate the area immediately due to parts of the dam falling away.

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The South Coast of NSW experienced dangerous rising floods into the late afternoon on Tuesday and eight streets have been evacuated

The Jerrara Dam wall has shown signs of crumbling as heavy rain continues to fall and pictures have captured torrents of water flowing over the dam wall

Evacuation centre was established at Country Club at 11 Paradise Beach Road in Sanctuary Point and at the Sussex Inlet Bowling Club in St George Ave for the flood victims with no alternate accommodation.

Emergency services also warned other locals in the south coast region that they may also be knocking on their doors for their urgent removal before 5am.

NSW Fire and Rescue carried out three flood rescues at Sanctuary Point, including removing an elderly man on dialysis from his home via an inflatable rescue boat.

Terara and Nowra have been issued with a minor flood water and are expected to exceed flood levels of 2.3 metres by 8am on Wednesday.

State Emergency Crews have already had to rescue three adults and two children who were unable to leave after the alert was issued for Jerrara Dam, west of Kiama, just after 9.30am on Tuesday.

The dam's 100-year-old wall is crumbling as heavy rain continues to fall and pictures have captured torrents of water flowing over the dam wall.

The nearby village of Minnamurra would bear the brunt of it if the dam wall collapses, with the SES advising parents with children at Minnamurra Public School to collect them.

A spokeswoman at Minnamurra Public School, which has 430 students, said it's a precautionary measure. SES evacuated more than 300 people from eights streets in Sussex Inlet and in St George Basin overnight The SES warned residents to take photos, momentos, spare clothing and sleeping bags to the evacuation centres

The Minumurra River extensively flooded farmland in Jamberoo on Tuesday with residents downstream of the Jerra dam being evacuated

The Jerrara Dam in NSW has been pictured overflowing and causing extensive flooding just hours after residents living downstream were ordered to evacuate the area immediately due to parts of the dam falling away

The dam is in the process of being decommissioned and has shown signs of crumbling as heavy rain continues to fall in the area

SES warned locals in St George Basin and Sussex Inlet areas that they will be knocking on their doors between 7pm and 5am overnight

Residents living downstream from the Jerrara Dam in NSW have been ordered to evacuate the area immediately due to parts of the dam falling away

Swamp road in Jamberoo, Kiama was closed on Tuesday due to the dangerous flood waters making it impossible for vehicles to cross

Emergency services also warned other locals in the south coast region that they may also be knocking on their doors for their urgent removal before 5am

'We do not know what is going to happen,' an SES spokesman said.

'The dam is currently being decommissioned and we are noticing the water is spilling over the top and is too risky, we are asking residents to evacuate immediately.'

Extremely dangerous flooding was expected in the surrounding areas including Mt Brandon Road, Jerrara Road and Jamberoo Road.

The SES has urged residents not to delay their evacuation, but are reminded not to travel through flood waters.

'Roads may be congested or closed. You could become trapped and need to be rescued. Remaining in flooded areas is dangerous and may place your life at risk.

'Wherever possible, people should go and stay with family or friends, or make other accommodation arrangements.'

The SES is keeping a close eye on 40 to 50 properties in the area that risk becoming isolated by flooded roads.

'Wherever possible, people should go and stay with family or friends, or make other accommodation arrangements'

Sanctuary point saw NSW fire and rescue carry out three flood rescues including removing an elderly man on dialysis from his home

The team worked long into the night to deliver elderly and disabled residents to evacuation centres

The rescue team assisted elderly passengers into a rescue inflatable boat to travel across the flood water

The SES has urged residents not to delay their evacuation, but are reminded not to travel through flood waters

Extremely dangerous flooding is expected in the surrounding areas including Mt Brandon Road, Jerrara Road and Jamberoo Road

Bridge crossings were cut off following the flooding of Jerrara dam, with only industrial vehicles able to maneuver through the weather

Downstream residents were evacuated as their farmland was submerged by a sea of brown flood water

Jerrara Dam in Kiama, south of Sydney, is in the process of being decommissioned and has shown signs of the wall falling due to heavy rain in the area

The floods come after enormous hail storms hammered parts of Sydney on Monday night with chunks of ice the size of 20 cent pieces

A property downstream of Jerrara dam is cut off by flood waters during flooding affecting the area on Tuesday

Up to 50 homes have already been left isolated by flood damage in Kiama.

The SES received 1600 calls for help and took part in 50 swift water across the state over the past 48 hours.

Forecasts for Tuesday predict wind gusts of up to 90km/h and heavy rainfalls across areas in southern NSW including Wollongong, Kiama, Nowra, Jervis Bay, and Ulladulla.

It comes after an enormous hail storm hammered parts of Sydney on Monday night with chunks of ice the size of 20 cent pieces raining down from the sky and flash floods submerging parked cars.

A tornado also swept through Dubbo in central NSW, leaving a dozen properties with serious damage and surrounding trees flattened.

The snow gods have delivered 30 cm of fresh snow to Thredbo in the past 24 hours, covering the resort in a beautiful white blanket

The resort has welcomed the snowfall with open arms, just in time for visitors to take advantage of the second half of snow season

The weather conditions at Thredbo are off to a great start ahead of the second half of the snow season for families and visitors

The snow gods have delivered 30cm of fresh snow to Thredbo in the past 24 hours, covering the resort in a beautiful white blanket

The resort has welcomed the snowfall with open arms, just in time for visitors to take advantage of the second half of snow season

The weather conditions at Thredbo are off to a great start ahead of the second half of the snow season for families and visitors

Perisher ski resort in NSW received 30cm of fresh snow overnight in the last few days of winter

Perisher has 47 lifts running across the four resort areas and 100 groomed runs thanks to extra snow overnight

Perisher says it doesn't look like the snow is showing any signs of slowing down despite spring being a few days away

Meanwhile, the state's snow resort copped a fresh coating of powder in the last 24 hours with up to 30 centimetres falling over Thredbo, covering the area in a beautiful white blanket all the way down to the village.

The resort has welcomed the snowfall with open arms, with even more snow expected throughout the day and across the coming week as the conditions at Thredbo are looking great ahead of the second half of the snow season.

'This snow dump really came out of nowhere, but we're definitely not complaining,' Thredbo Resort Operations Manager Stuart Diver said.

'It has set us up perfectly for the start of spring, proving winter certainly isn't over yet - it just keeps on delivering the goods!'

A man had a lucky escape on Tuesday morning after a tree came tumbling down on his car as he was driving to work

Police are warning drivers to be careful after posting a picture of what appears to be a car being caught up in the dangerous flooding 'It's not worth risking your safety, or the safety of those who may need to rescue you!'

Flash flood breaks into a property as extensive rain water is seen pouring down a flight of stairs

Extensive storm swept through Sydney overnight, leaving this property damaged in Woollahra on Ocean Street

A Sydney local captured 'one foot of water running down Harris Street in Pyrmont' overnight

An enormous hail storm hammered parts of Sydney on Monday night with chunks of ice the size of 20 cent pieces raining down from the sky and flash floods submerging parked cars

Outside of Central Station in Sydney turned into a waterway overnight as heavy rain swept through the city

Many took to social media to share their disbelief at the size of the hail stones that battered the city

A tornado also swept through Dubbo in central NSW, leaving a dozen properties with serious damage and surrounding trees flattened

Flash floods targeted Circular Quay with commuters seen wading through knee-deep water and pubs forced to close due to rain seeping in

Hail the size of $2 coins also blanketed Oberon in the Blue Mountains on Monday night

Many took to social media to share their disbelief at the size of the hail stones that battered the city