UPDATE: Cecil Plains residents had until late yesterday to finalise their flood provisions before the swollen Condamine River cut the road to Toowoomba.
Millmerran police officer Senior Constable Hans van Kempen said the Toowoomba Cecil Plains Rd would be engulfed by the river last night.
"It is not expected to be open for a few days," Snr Const van Kempen said.
The Gore Hwy on the eastern and western sides of Millmerran was closed, stopping access between to Toowoomba and Goondiwindi.
The Millmerran Cecil Plains Rd was also closed.
He said two homes near the intersection of the Millmerran Leyburn Rd and the Gore Hwy had been inundated but residents had been well-prepared and were not caught in the flood.
A resident of one of the homes, who did want to be named, expected floodwater to have pooled about 15cm above his floorboards.
"It is a timber floored house so we will just hose her out and start again," he said.
"Compared to other people it is nothing to be honest."
Hotel Victory co-owner Allen Volz said the extra provisions of beer needed for the flood isolation had arrived in plenty of time.
"We'll be cut off for up to four days they tell us," Mr Volz said.
YESTERDAY: Emergency supplies of beer are expected to arrive at the Hotel Victory this afternoon as Cecil Plains residents prepare to be isolated by rising floodwaters.
Hotel owner Nat Volz said the Cecil Plains Dalby Rd was closed by floodwaters at Oakey Ck when he tried to drive to Dalby this morning.
He said water levels were about a metre under the Condamine River bridge on the Toowoomba Cecil Plains Rd at midday today.
"It is rising pretty quickly," Mr Volz said.
In light of this, extra beer was trucked out from Toowoomba this afternoon.
"We've got a bit more coming today in case we do run out."
Millmerran police officer Senior Constable Hans van Kempen said the Gore Hwy between Pittsworth and Millmerran would be closed at the Centenary Bridge by day's end.
It was open to one lane of traffic this afternoon as the rising Condamine River flooded the road.
The Gore Hwy between Millmerran and Goondiwindi was closed today.
"The Millmerran Cecil Plains Rd is still open but there is water on the road," Snr Const van Kempen said.
He expected the Toowoomba Cecil Plains Rd to be closed by tomorrow.
"It looks like we will get cut off for a couple of days.
Snr Const van Kempen said residents along the Condamine River were aware of the impending flood.
"The ones that might be (flooded) are aware of it and have moved what they need to."