A former star from  The Block  has taken to social media to  offer assistance  to those stranded by floods in northeastern NSW.

Elyse Knowles first shared a view of the flood waters from inside a vehicle on Monday, before sharing a second clip offering to help those in need on Tuesday.

Images: @elyse.knowles (Instagram)

“Headed out to Lismore with a boat before sunrise. If you know anyone in need please contact me,” Ms Knowles wrote on her Instagram story.

In a follow-up clip, the 29-year-old said she would travel up to the South Golden and New Brighton area and encouraged people in need to reach out and message her fiance, Josh Baker.

Images: @elyse.knowles (Instagram)

“If your phone is running out of battery and you need rescuing please change your voicemail to your address and current situation,” she posted later that morning.

Ms Knowles appeared on  The Block  with her now-fiance in 2017, with their apartment helping them secure victory.

 
 
 
 
 
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A post shared by Elyse Knowles (@elyse.knowles)

The Melbourne couple now live in Byron Bay and had their first child together last February.

The flooding in northern NSW and Queensland has stranded thousands of people and resulted in the deaths of several across both states.

In Lismore, the Wilsons River peaked at 14.4 metres on Monday afternoon and has been gradually falling since.

It is expected to reach below the major flood level on Wednesday.

Images: @elyse.knowles (Instagram)