The flood emergency continues in NSW and Victoria, with evacuation orders current in many parts of the two states.

In NSW, there are 85 flood alerts, with 14 at emergency level including in Condobolin, Collarenebri, Bourke, Maude, Moulamein, Mathoura, the Cobar Shire, and Moama and Murray Valley Regional Park near the NSW/Victorian border.

In Victoria, there are 47 flood alerts, including emergency level warnings for Karadoc and Iraak Island.

The extreme weather conditions and widespread damage to roads have impacted deliveries in a number of areas, an Australia Post spokesman said.

"Condobolin is currently inaccessible, however on Wednesday, we were able to access some parts of Forbes and we'll continue to monitor these locations to recommence deliveries where we can," he said.

"While Molong and Eugowra post offices were impacted by flood waters, our teams have worked hard to restore operations as soon as possible. Deliveries from these post offices recommenced on Monday, November 21 and we expect restoration of full services, including Bank@Post, by the end of the week."

IN OTHER NEWS

Parcel Post items sent to Western Australia from the east coast may take an additional two weeks to be delivered.

"Heavy rain and flooding have closed the Sydney-to-Perth rail line. The Melbourne-to-Adelaide rail link was closed due to damage caused by a train derailment and reopened on November 21, however delays are expected due to a backlog of freight," Australia Post said in a statement.

"Our express post service is not affected by the rail network disruptions, if you need to send items to Western Australia urgently, consider this option."

It said that as more customers opt to use this service, it may result in a two-day delivery delay.

Free mail redirection, for 12 months or mail hold for up to four weeks, is on offer from Australia Post for people impacted by the floods.

The Australia Post spokesperson said as some roads remain closed across NSW, diversions were in place to continue deliveries where possible.

"Our immediate priority is always the safety of our team members, and we will continue to work closely with our local teams to monitor at-risk areas and determine when and how deliveries can resume, with weekend deliveries now occurring in some locations," he said.