WA has strengthened its border restrictions with Northern Territory, Queensland and the ACT.
From 6pm tonight, those State's will join Victoria on the 'low' risk setting meaning all arrivals will need to complete 14 days of self-quarantine and be tested for COVID-19 on arrival and on day 11.
New South Wales remains at medium risk - with travel not allowed without an exemption.
For now, South Australia and Tasmania will be the only jurisdictions that remain at the ‘very low risk’ setting.
"I know these immediate changes will cause significant disruption for many people, especially with school holidays. But we just cannot afford to take any chances," Premier Mark McGowan said.
"These changes to our border arrangements are a safe and sensible response to the alarming outbreaks we’re seeing over east - and an important step to keep our community safe."
The move comes after WA recorded one new local case of COVID-19 overnight.
The local woman tested positive after returning from a trip to New South Wales.
Phase one restrictions have since been introduced for at least the next three days including mandatory mask wearing.
Tragic update in search for missing man Robert Snyder
Premier Roger Cook to leave Kwinana electorate, move to Perth
Mandurah Marine Rescue's new vessel named in memory of nun who survived 1959 boating accident
Teen dies in motorbike crash at Waroona Dam
Shark alert issued after whale carcass reported at Preston Beach
Kwinana businesses to refuse serving students during school hours
Men attacked, campervan windows smashed in East Rockingham
Entries for 2026 Castaways Sculpture Awards now open
Meadow Springs man pleads guilty to threatening to kill PM and NSW Premier