West Australian Premier Mark McGowan has again ripped into the NSW government over its handling of the Covid-19 pandemic, describing their actions as a “catastrophic failure”.

Mr McGowan said there was a significant population outside of NSW and no one should have to suffer because the eastern state had “made a mess” of its Delta outbreak.

“There is an Australia outside of NSW … all of the people in NSW need to understand that,” he told reporters on Monday.

“Just because the NSW government has made a mess of it doesn’t mean the rest of us should suffer.”

Mr McGowan said there appeared to be some “self-serving justification” going on in NSW when in fact their government’s model for tackling the virus had been a “catastrophic failure”.

The Premier’s comments came after Prime Minister Scott Morrison suggested some leaders were deviating from the national plan to reopen the country and end large-scale lockdowns once 80 per cent of the eligible population was vaccinated.

“Once you get to 70 per cent of your country that is eligible for the vaccine and 80 per cent, the plan sets out that we have to move forward — we cannot hold back,” Mr Morrison said.

“We must adjust our mindset. Cases will not be the issue … dealing with serious illness, hospitalisation, ICU capabilities, our ability to respond in those circumstances, that will be our goal.”

While the Prime Minister indicated some people were seeking to “undermine the national plan”, Mr McGowan rejected that suggestion.

“If he’s referring to me, everything I’ve said is consistent with the national plan,” Mr McGowan said.

“This is a time for calm heads, for cool heads. We don’t need rash decision making on the basis of what is occurring in NSW.”

Mr McGowan said his view was that the modelling should be redone — and he said that was agreed at national cabinet on Friday.

“Everyone agreed the modelling was out of date,” he said.

“All I’d say to everyone over east is calm down, use cool heads.

“Understand that people across Australia actually prefer not to have Covid … and the NSW model is not the way to go.”

Mr McGowan has repeatedly indicated that he would reserve the right to impose lockdowns after the 80 per cent target was reached.

Later asked if he was referring to Mr McGowan with his comments, the Prime Minister laughed and quipped he was talking about Federal Opposition Leader Anthony Albanese.

“I’m working with all the premiers,” he told 6PR radio.

Mr Morrison said if lockdowns were put in place in areas where there was a vaccination rate of 80 per cent it would do economic harm.

But he acknowledged that the situation in the west was different to the east.

“At some point in time we all have to rejoin the world,” he said.

“We need to manage living with the virus rather than squirrelling away from it.”

He further warned that the Delta variant moved quickly.

“It can disrupt your life. It can cost you your life. So it’s very important for people to get vaccinated,” he said.

“But I get it, that in a place that doesn’t really see much Covid they can feel like the system is giving them their inoculation. It won’t.

“WA is not a good enough vaccine. It’s not as good as the vaccine of AstraZeneca and Pfizer — those things can inoculate you against Covid-19. Borders and other things like this can’t.”

Meanwhile, NSW recorded a further 818 cases and three deaths in the 24 hours to 8pm on Sunday.

From 12.01am on Thursday, NSW will be classified an “extreme risk” state under WA’s tough border regime.

It means no travellers from NSW will be permitted to enter WA — even on compassionate grounds.

Approved travellers will be limited to Commonwealth and state officials, parliamentarians, diplomats and specialist or extraordinary circumstances.

Those people must undertake hotel quarantine at a state facility for 14 days at their own expense, get tested on days one, five and 13, return a negative PCR test in the 72 hours before arrival and show a receipt of at least one dose of a Covid-19 vaccine if eligible.

Mr McGowan said 119 people flew in from NSW on Sunday, with a further 138 scheduled to arrive later on Monday.

A further 145 people are expected on Tuesday and more than 200 on Wednesday.

Mr McGowan also revealed the potentially virus-infected Ken Hou ship, which has 22 crew members on board, had arrived at Cockburn Sound.

He said 16 people were displaying elevated temperatures and reported feeling unwell.

The crew are expected to be tested for Covid-19, but Mr McGowan said he wanted the bulk carrier to sail away as soon as possible.

The vessel was supposed to dock in Albany on Saturday.

WA recorded one new case of coronavirus overnight — an overseas traveller in hotel quarantine.