Residents remain on high alert in Talgai, southwest of Brisbane, as a dam break continues to threaten homes.
Residents surrounding a Queensland dam are still on high alert, as water continues to seep out of a 433 megalitre dam.
Rural properties were evacuated overnight after a landowner spotted a 3.5 metre hole in the Bolzan Quarry dam on his property at Talgai, about 170km southwest of Brisbane, on Friday afternoon.
As the stability of the dam remains in question, the Southern Downs Regional Council, consulting engineers, Queensland Fire and Emergency Service and Queensland Police Service have all attended the site to assess the damage to the wall.
Those evacuated from 12 properties - mainly grain and cattle farms - are not yet allowed to return home.
"Engineers on site have identified that the dam wall is still at risk of failure," a Southern Downs Regional Council spokeswoman said on Saturday.
"As such, evacuees have been advised to remain where they are at this stage."
A cofferdam with a 50 megalitre capacity and a large paddock have contained some overflow.
On Friday night the council issued text messages to about 5,000 people warning of the dam failing.
Southern Downs Regional Council disaster management staff will remain on duty overnight.
Meanwhile, two adults and an infant had to be rescued from a car stuck in floodwaters south of Brisbane early on Saturday morning.
Firefighters used boats to rescue the three from the car roof at Chambers Flat in Logan about 3am.
A woman was taken to hospital as a precautionary measure, but another adult and an infant were uninjured.
Storms are possible for large parts of eastern Queensland on Saturday afternoon, but nothing like the deluge over the past few weeks.
On Saturday, Captain Creek in the Gladstone region recorded 73 millimetres in one hour.
Lower Gregory near the Whitsundays region saw 57mm and Eungella in the Mackay region recorded 55mm since 9am.
Isolated heavy rainfall is possible for coastal areas south of the Whitsunday islands.
Days of heavy rain in the southeast corner have led to flooding that is just starting to subside.
Northern Queensland can expected showers and thunderstorms to break a severe heatwave.
On the Gold Coast, police are still searching for Yang Chen, 26, who disappeared in the hinterland area while walking near Gorge Falls in the Tallebudgera Valley earlier in the week.