Up to 6cm of rain could fall in Brighton and Hove within the space of a few hours today, bringing the risk of flooding and disruption to transport.
The Met Office has issued a yellow be aware weather warning for the south east of England.
A band of heavy rain is expected to cross the area from the south, then travelling westwards.
The BBC is forecasting heavy rain for the city from now until 6pm.
The Met Office warning says: “There is a small chance that homes and businesses could be flooded, causing damage to some buildings
Where flooding occurs, there is a slight chance of delays or cancellations to train and bus services
“Spray and flooding could lead to difficult driving conditions and some road closures
“There is a small chance that some communities become cut off by flooded roads
“Areas of, at times heavy, rain will push north and then westwards across much of south and east England on Monday.
“Whilst some places will miss the worst of the rain 10-25 mm of rain may occur quite widely, with some areas potentially seeing up to 60 mm and much of this falling in less than six hours.”
