An emergency flood plan has been activated by the council in response to continued heavy rain across the borough.
Seven flood teams were deployed at 4.30pm to known flood sites in Darton, Low Barugh, Lundwood, Burton Grange, Aldham Bridge, Low Valley, Darfield Bridge and Bolton on Dearne.
In Low Valley, residents have been nervously watching the River Dearne from the bridge on Stonyford Road, which is still closed due to its bank collapsing at the last round of flooding in June.
Low Valley Flood Group chairman Pete Bradshaw said the river had risen by half a metre since noon to one metre.
The river flooded at two metres in June but Pete said there were worries residents would be unable to sandbag the river as in June because the council had not repaired the banks.
He said: "In the last hour it's gone up 0.1 of a metre - it's flying up even though it didn't look that bad this morning. It's a big reminder to the council, even if it doesn't flood, that they've done nothing."