Police made an emergency declaration under the Public Safety Preservation Act (PSPA) in relation to a dam leak in Talgai at 10.40pm last night, after the dam began leaking water.
The affected area is bounded by Hendon Victoria Hill Road, Warwick Allora Road, Pratten Road and Yankee Gully Road.
Overnight seven properties were door knocked by police and all residents were evacuated who hadn't already self-evacuated. A further five properties have been door knocked this morning with occupants self-evacuating.
The Queensland Police Service and emergency services are working with dam engineers to ensure all precautions have been taken.
All potentially affected residents have been evacuated for their own safety.
Engineers have met with the dam's owners this morning and the QPS is working with the Queensland Fire and Emergency Services, Southern Downs Regional Council, engineers and property owners to manage and monitor the incident.
Police are appealing for all members of the public to avoid the area.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.
