The Met Office has issued a yellow weather warning for rain.
The warning, which covers parts of southeast England, said that up to 40mm of rain could fall.
It is in place from 3pm on Sunday until 9am on Monday.
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Greg Dewhurst, a Met Office meteorologist, urged people to “take care” if travelling through the day on Sunday across southern counties.
The weather agency warned there is a chance of delays or cancellations to train and bus services and that driving conditions could be difficult.
A separate yellow warning is in place across parts of the southwest, including Exeter and Truro, from 6am on Sunday until 6pm.
The Met Office said flooding is possible, which could cause damage to buildings.
“We are keeping an eye on this area of low pressure as it moves into southern counties of England and Wales over the course of Sunday and into Monday,” Mr Dewhurst said.
“It will bring some heavy rain and some strong winds as well. This rain is falling on saturated ground and could lead to some localised flooding problems.”
Across England, 57 flood warnings had been put in place as of 12.30pm on Saturday afternoon, and 183 flood alerts.
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The Environmental Agency said groundwater flooding is possible for the next five days in parts of North Yorkshire and the south of England.
Earlier this week, schools closed and roads and railways were flooded as heavy rain fell on already saturated ground.
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Areas of southern, central and eastern England were hit with “lively and active showers” on Thursday, Met Office forecaster Simon Partridge said.
Herefordshire and Worcestershire councils said several schools had closed because of rising flood levels and “treacherous road conditions”.
About 33mm of rain was recorded in Broadstairs, Kent, with western Scotland all the way down to Cornwall experiencing hail and showers.
The strongest winds pounded the English Channel, with 63mph recorded on Portland in Dorset and 59mph on the Isle of Wight.
William Turner is a seasoned U.K. correspondent with a deep understanding of domestic affairs. With a passion for British politics and culture, he provides insightful analysis and comprehensive coverage of events within the United Kingdom.
