Fresh weather warnings have been issued for heavy rain, with some areas already saturated by earlier downpours to be hit.
Parts of the country saw more than the monthly average rainfall on Monday, while some counties in southern and central England have already had more than 250% of their September average, according to the Met Office.
Yellow weather warnings for wind and rain came into force on Sunday, while two fresh yellow warnings have been issued for heavy rain next week.
Sunday’s warning, meaning further heavy rain is likely to cause some travel delays and flooding, covers much of southern England and South Wales between 4pm on Sunday and 9am on Monday.
Between 20mm to 30mm of rainfall could be seen over nine to 12 hours, with up to 80mm in some localised places on higher ground.
The Environment Agency has issued 33 flood warnings, indicating flooding is expected, and 67 flood alerts, where flooding is possible, in place across England on Sunday afternoon.
Mark Garratt, flood risk manager at the Environment Agency, said rain expected on Sunday and Monday will bring a risk of surface water flooding in large parts of the southwest and southern England, spreading up into the Midlands, and on Monday, flooding in parts of Leicestershire is also possible.
UK weather: Wind warning issued by Met Office after week of heavy rain and floods
UK weather: New heavy rain warning issued by Met Office across flood-ravaged Britain
UK weather: Flash floods leave cars underwater as some areas see more than a month’s rainfall
He said: “It is especially important that people do not drive through flood water – it is often deeper than it looks and just 30cm of flowing water is enough to float your car.
“Across the country, Environment Agency teams have been out checking flood defences and clearing any debris from storm drains and are also supporting local authorities in responding to surface water flooding.
“The advice to the public to keep checking their flood risk, and search ‘check for flooding’ and to sign up for free flood warnings on the latest situation or follow @EnvAgency on X for the latest flood updates.”
Check latest weather forecast where you are
A yellow warning for wind is in place across southwest England and Wales between 9am on Sunday until the end of the day.
Gusts of between 50mph and 60mph could be seen, with large waves, trees brought down, travel disruption and some power cuts.
Fresh rain warnings issued
Rain warnings cover eastern England between 8am on Monday and 3am on Tuesday, and North Wales and northwest England between 12.30am and 8pm on Monday.
Both forecast between 20mm and 40mm of rainfall widely, with 60mm possible in a few places across North Wales and northwest England and between 60mm to 80mm in some areas in eastern England.
Met Office meteorologist Liam Eslick said they are expecting some “pretty heavy persistent rain” across North Wales and northwest England.
Read more from Sky News:
Former deputy PM interviewed in election betting probe
Boy, eight, dies after being shot at farm
Keep up with all the latest news from the UK and around the world by following Sky News
The higher ground in eastern England will see the most rainfall. Areas including Northamptonshire and Bedfordshire will see less rainfall, but are already saturated by recent heavy rain.
It comes after areas across England suffered heavy rain and localised flooding in recent days, with commuters facing widespread disruption on road and rail services.
About 650 properties were flooded in Bedfordshire, Northamptonshire and the home counties, according to the Environment Agency, which estimated around 8,200 properties had been protected.
Be the first to get Breaking News
Install the Sky News app for free
By Tuesday night, higher pressure will move in, meaning a drier, sunnier spell, Mr Eslick said.
“Come Tuesday night into Wednesday we’re starting to see higher pressure, so turning a lot drier and plenty of sunny spells,” he said.
“But the following weekend, it does look like there’s a further low pressure coming in, but we’re still keeping an eye on that.”