Flooding has closed part of the Bruce Highway, towns have been cut off, roads washed away and people rescued as a barrage of rain continues to hammer southern and central Queensland.

A 7-Eleven-anchored convenience retail site in the Moreton Bay Region has sold for $8.7m, including an adjoining residential property.

Almost every part of Queensland is on high alert for flooding and river rises as the tropical low which smashed the Far North sweeps down south.