Residents in flood-ravaged villages across Yorkshire and Lincolnshire have been told to expect more heavy rain with forecasters warning there could be a danger to life.
The Environment Agency has warned people to "remain vigilant" as more downpours are expected over the next few day in areas already affected by flooding.
A yellow weather warning was issued for the saturated region, which has seen hundreds of people forced to leave their houses.
The Met Office said the warning for rain across the north meant fast flowing or deep floodwater was possible, "causing a danger to life".
It said further homes and businesses could be flooded, some communities may be cut off and power cuts were possible.
Eight flood warnings remain in place across the country, including the Barlings Eau, near Lincoln, where farmland is already under 6ft to 10ft of water.
Flood-hit towns face a dreadful forecast from Thursday as forecasters warn up to 45mm of rain could cause swollen rivers to rise again and inundate more homes.
It is feared that level of rainfall could also bring more surface water flooding to parts of South Yorkshire, Lincolnshire and the Midlands.
Around 300 Environment Agency staff are working around the clock deploying 39 pumps across five locations, the authority said.
In Fishlake, near Doncaster, South Yorks., five ultra-high volume pumps are being used to pump out 16 cubic metres of water per seconds.
Kate Marks, flood duty manager at the Environment Agency, said: "Heavy rain is expected on Thursday, Friday and over the weekend which could lead to further flooding for communities in South Yorkshire around the Lower River Don.
"Parts of Lincolnshire and the Midlands could also be affected by rain falling on already saturated ground over Thursday and Friday, as well as other parts of England as rain crosses the country from west to east.
"It's really important that impacted communities remain vigilant and take steps to prepare for flooding by checking their flood risk regularly and making plans to stay safe.
"The Environment Agency has teams working around the clock on the ground erecting temporary barriers and delivering sandbags to areas expecting further rainfall.
"Our incident rooms remain open 24 hours a day and we are continuing to work closely with local authorities and partners.
"We advise people to stay away from swollen rivers and not to walk or drive through flood water as just 30cm of flowing water is enough to move your car." Soldiers have been drafted into South Yorkshire to help shore up bridges and flood defences with sandbags.
About 500 homes have been flooded in Doncaster with 1,200 properties evacuated in areas hit by the floods.
Hundreds of people in Fishlake have fled their homes and the council said the village was not safe and that "a return to properties is discouraged in the strongest possible terms".