People may be trapped in a submerged car that was washed off a causeway by floodwaters in southern Queensland.
Emergency services are unable to reach the vehicle which was swept off a causeway and into a creak at Yalangur, north of Toowoomba, about 10am on Wednesday.
The Queensland Fire and Emergency Services says rescuers in boats are unable to check if anyone is inside the car due to the dangerous conditions.
"It's submerged and obviously due to the amount of water, they're unable to conduct a full search. They're waiting for that water to recede so ... they can conduct a search of that vehicle," a QFES spokesperson told AAP.
Meanwhile, floodwaters are receding in one town where 900 people were evacuated, but other towns and villages in southern Queensland are on alert amid a continuing deluge.
An emergency was declared in the border down of Inglewood, in the Goondiwindi local government area, on Tuesday night.
Goondiwindi Mayor Lawrence Springborg said the the focus is on flood mitigation as the waters slowly recede on Wednesday.
"It's fallen as quickly as it rose, and it rose very, very quickly last night," he told AAP.
"There's some residual showers around. We're informed that the bulk of the rainfall is gone, but we're now dealing with the consequences."
More than 50 gauges recorded 100mm of rain in the past 24 hours in southeast Queensland alone, said the Bureau of Meteorology.
Major floods are occurring in two other towns on Wednesday, while a further two are likely to be inundated overnight.
The State Emergency Service was involved in more than 30 swiftwater rescues and responding to more than 320 called for help on the 24 hours to 9am on Wednesday.
More than 50 gauges recorded 100mm of rain in the past 24 hours in southeast Queensland alone, said the Bureau of Meteorology.
Police Deputy Commissioner Steve Gollschewski said an emergency alert is being issued for 200 residents who will be evacuated in the town of Yelarbon.
"We are ahead of the game with that," he told reporters on Wednesday
"So we have confidence that we'll be able to execute that quite well."
Major floods are occurring in two other towns, while a further two are likely to be inundated overnight.
The Bureau of Meteorology reports the Logan River is flooding at Beaudesert, south of Brisbane, for the second time in four days.
Floodwaters peaked at 10.1m in the town of 6400 residents on Saturday, above Beaudesert's major flood level of 8.3m.
The forecaster expects the river to peak in the town at 10.2m on Wednesday after up to 100mm of rain fell in parts of the already soaked catchment in the past 24 hours.
Closer to Brisbane, heavy rainfall is causing major flooding along Warrill Creek with about 600 residents in Harrisville on alert.
The creek is already at 5.02m, above the town's major flood level of 5m, and is still rising.
Near the NSW border, the Dumaresq River is also putting homes and businesses in the town of Texas at risk of major flooding.
More than 840 residents of the southern town are preparing for the river to exceed a major flood level of 8m on Wednesday night.
About 870 residents in Taroom are also being warned that the Dawson River could peak above a major flood level of 7m overnight.
Southeast of Brisbane, the Bremer River is moderately flooding at the towns of Rosewood and Walloon, and the Ipswich suburb of Amberley.
Police Minister Mark Ryan urged people to keep an eye on local weather forecast and not to drive into floodwaters.
"Queensland is so saturated right now that it doesn't take a whole lot more rain to start localised flash flooding," Mr Ryan told parliament.
"There are rivers already subjected to major flood warnings.
"And while Queenslanders have been through these scenarios many times before the potential dangers don't go away, we keep on saying it but it is so crucial to adhere to that slogan: If it's flooded forget it."
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