The Met Office has extended its yellow weather warnings until Thursday with heavy rain continuing to batter parts of Britain.
Rain will be persistent over areas of Wales on Wednesday with a risk of more homes flooding in the aftermath of Storm Dennis that has claimed the lives of three people.
People have been warned of further transport chaos with more delays and cancellations expected.
The Environment Agency's current figures show three severe flood warnings with 'danger to life' and 219 flood warnings across the country.
There are also 263 flood alerts which remain in place.
A minister has admitted the Government will not be able to protect every house from flooding after the country was hit by a second major storm within a week.
New Environment Secretary George Eustice told Sky News that the Government had not been caught off guard by the floods caused by Storm Dennis.
Treacherous weather conditions look set to continue this week.
The Met Office says: "Rain arriving Wednesday morning may become persistent, and possibly heavy, over areas of high ground in Wales, before clearing Thursday.
"There is a small chance that homes and businesses could be flooded, causing damage to some buildings.
"Should flooding occur, there is a chance of delays or cancellations to train and bus services.
"Spray and flooding could lead to difficult driving conditions and some road closures."
Hereford and Worcester Fire and Rescue Service said it had pulled one man from the River Teme at Eastham Bridge on Sunday morning, with a female casualty still unaccounted for as of about 4pm.
A man in his 60s died on Sunday after being pulled from the River Tawe near Trebanos Rugby Club in Wales, but Dyfed-Powys Police said his death was not being linked to the bad weather.
The bodies of two men were pulled from rough seas off Kent on Saturday as the UK was struck by a storm for the second weekend in a row.
More than 400 properties have been flooded by Storm Dennis, the Environment Agency said.
John Curtin, executive director of flood and coastal risk management, tweeted that 420 were flooded, with 18,500 protected.
He said both figures were "likely to rise".
Sharing a photo of Environment Agency statistics, he indicated that 800 properties were flooded by Storm Ciara.
Severe weather conditions over the weekend saw winds of more than 90mph lash parts of the UK, while more than a month's worth of rain fell in 48 hours in places.
Major incidents were declared due to flooding in South Wales as well as in Worcestershire and Herefordshire, while a record number of flood warnings and alerts were issued by the Environment Agency.
Earlier, the Ministry of Defence deployed Army personnel to assist people in West Yorkshire areas badly hit by flooding during the previous weekend's Storm Ciara.
The situation was said to be "life-threatening" in South Wales, where the Met Office issued a red warning due to heavy rainfall and flooding risk.
