Deputy premier Steven Miles has announced that south-east Queensland's lockdown will now run until at least Sunday August 8 after the state recorded 13 locally acquired Covid-19 cases plus two from hotel quarantine.

"It's starting to become clear that the initial lockdown will be insufficient for the outbreak," Miles said in a press conference on Monday morning. "So we're advising south-east Queenslanders in the 11 LGAs that the lockdown will be extended until 4pm on Sunday. That will make it an eight-day lockdown."

The region's initial three-day lockdown was called on Saturday for residents in Brisbane, Noosa, the Sunshine Coast, Ipswich, Logan, Redlands, Gold Coast, Scenic Rim, Lockyer Valley, Somerset and Moreton Bay. But after more people tested positive to Covid, the government says they have been left with no other option but to extend the stay-at-home orders. Of particular of concern is that cases are spreading in schools for the first time, and among students, teachers and parents.

"This outbreak is escalating," says Queensland's chief health officer Dr Jeannette Young. "But I am very confident that with the strategies we have in place in Queensland and with the cooperation of every single Queenslander, we will get through it. And I need people in the 11 LGAs who are under this stay-at-home order to do just that. To stay at home. So we are mobilising support for people," she says.

The stay-at-home order means residents can only leave their house for four reasons:

• To obtain essential goods, limited to a 10-kilometre radius of your home;
• For essential work, or school or childcare for vulnerable children and children of essential workers;
• To exercise, with only one person from outside your household and within 10 kilometres of your home;
• For healthcare, to care for a vulnerable person or to get a Covid test or vaccination.

Restaurants, cafes, bars, pubs, food courts and other food venues have closed but are able to sell food and drink to take away. Non-essential retail, cinemas, entertainment venues, gyms and places of worship are also closed.