The entire state of Victoria will go into a seven-day lockdown from 11.59pm tonight.
It comes as 12 new locally acquired cases of COVID-19 were detected in the past 24-hours.
The total number of active cases in Victoria is 34.
In a statement Acting Premier James Merlino said "this kind of short, sharp action is effective in stopping this thing in its tracks".
There will only be five reasons Victorian are allowed to leave their home: food and supplies, authorised work, care and caregiving, exercise for two hours and with one other person, and getting vaccinated.
Exercise and shopping will be limited to a five kilometre radius.
Only one person per household can go shopping.
Facemasks must be worn inside and outside.
Private and public gathering are not allowed.
Aged care facilities, no visitors except for limited reasons.
Only hospital visitors allowed are for end of life, to support a partner during birth, or a parent accompanying a child.
No visitors to your home other than an intimate partner. Single bubbles will be permitted. If you live alone, you can make a bubble with another person.
Childcare and kinder will remain open, but schools will close other than for children of authorised workers and vulnerable children.
Cafes and restaurants can only offer takeaway.
Gyms, hairdressers, community facilities and entertainment venues will be closed.
Non-essential retail can provide click-and-collect.
Funerals limited to 10 people, plus those running the service.
Hotels, clubs, TABs and casinos will be closed
Indoor and outdoor entertainment venues, swimming pools, spas, saunas, indoor and outdoor springs, community venues, drive in cinemas, amusements parks and arcades, creative studios, art galleries and museums, tourism, tours, and transport, and auctions can only happen online.
Weddings cannot proceed unless end of life or deportation reasons apply.
Religious activities will not proceed other than through broadcast with a maximum of five people.
Interstate reactions and border closures
NSW Premier Gladys Berejiklian this morning warned residents against 'unnecessary travel' to Victoria, stating she was 'worried about the evolving situation'.
She foreshadowed that Victorians leaving the state would still be subject to the lockdown restrictions.
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"There are 55 crossings of the border and we just ask everybody to do the right thing," she said.
"We've relied on the goodwill of our citizens during the entire pandemic. Let's not give up now.
"I'm worried about the evolving situation and of course we'll watch closely to see what the Victorian government announces this morning."
From 10am Perth time, Victoria will be designated a "medium-risk" jurisdiction under WA's controlled border regime.
Travel will be blocked for anyone who has been in Victoria since May 16 unless they secure an exemption.
Tasmanian Premier Peter Gutwein announced the heightened measures at noon today, saying the entire state of Victoria would be classified as high risk to Tasmania.
"This means that after 2pm this afternoon, you cannot travel to Tasmania if you have spent time in Victoria ... unless you are approved as an essential traveller by the state controller," he said.
The ACT has introduced a new stay-at-home requirement for anyone who leaves Victoria from midnight and enters the ACT.
Non-ACT residents leaving Victoria after midnight will not be able to enter without exception.
Yesterday, South Australia slammed shut its border for any travellers from Greater Melbourne.
Thousands of New Zealand residents are currently in Victoria, making use of the trans-Tasman bubble.
However, their route home was been blocked when the NZ government paused their quarantine-free travel arrangement in response to new community cases.
The Victorian government has announced everyone over-40 can now be vaccinated.
Testing facilities are experiencing high-demand.
Impact on events
Approved professional sporting events will proceed but without crowds.
However, Winton Raceway, near Benalla, Victoria, has already postponed this weekend's Winton Supercars Championship. It will now be held July 31- August 1.
"While regrettable, today's decision has been made to ensure the health and safety of all Supercars fans, staff and teams," Supercars said in a statement.
"Ticket holders for this weekend's event can either collect a full refund or hold on to their tickets for the Winton SuperSprint to run on the new dates.
"Supercars and the Benalla Auto Club will continue to ensure that all events are compliant with appropriate State, Territory and Federal regulations."