Residents in the southeast Queensland town of Dalby have been moved from their homes as a river neared an expected peak of more than 3 metres.
Western Downs Mayor Ray Brown said water from the Myall Creek started entering homes when the level reached 2.8m. It was expected to get to 3.3 metres or higher.
Mr Brown told AAP just before midnight on Saturday that power was off to some homes, and residents and the travelling public are being moved to safe areas.
An emergency alert was issued for the Lockyer Valley region, west of Brisbane, and Banana Shire Council.
Heavy rain has also fallen in the regions around Mackay, Bundaberg and Rockhampton on the state's central coast and the Gold Coast in the southeast.
The Australian Bureau of Meteorology said the impact of the floods affecting the state were relatively minor late on Saturday.
Meanwhile the government is keeping a close eye on its dams in the southeast.
Water Supply Minister Mark McArdle says releasing water from the dams will reduce the risk of flooding.