Severe weather warnings of heavy rain, and flood alerts, are in place across parts of England and Wales.
The Environment Agency has issued alerts warning of possible flooding in 34 areas – 28 in south-east England, three in Wales and others in the Midlands and parts of northern England.
Heavy rain has caused river levels to rise in the River Mole, leading to a flood alert at Gatwick Airport.
The Met Office warned of heavy rain in London and south and east England.
BBC Weather said rain would affect many southern, central and south-eastern parts of England overnight and become persistent and very heavy in places, particularly in the South East.
It said further outbreaks of rain would affect parts of Scotland.
The latest warnings follows a weekend of heavy rain and flooding, mainly focused on Wales.
- The M1 was closed between junctions 48 and 45 southbound and between junctions 43 and 46 northbound after flooding left debris on the carriageways.
- Basement flats on the seafront in Littlehampton, West Sussex were badly hit, with some properties being flooded up to 4ft (1.2m) deep.
- Incidents were reported in the village of Boroughbridge, North Yorkshire, while there was flooding in 15 homes in the Badger Hill district of York.
- Water was pumped from 12 flooded homes in Athersley North in Barnsley, South Yorkshire.
- Services on South West Trains have been disrupted between Shepperton and London Waterloo due to flooding at Fulwell, in south-west London.
In West Sussex, about 40 properties as well as the basement of Worthing Hospital were flooded. Most of the water had been pumped out of the basement by Monday morning.
Sasher Thomas was one of nine tenants forced to move out of a block of flats in South Norwood, south London, because of the flooding.
She told the BBC: “My neighbour called the fire brigade last night but there was nothing they could do apart from turn the electric off.”
“I’ve had no sleep at all overnight because I’ve had nowhere to go,” she added.
On Saturday about 1,000 people were moved to safety from flooding in mid Wales, with an estimated 150 rescued.
BBC