A Flood Alert has been issued by the Environment Agency for the Ifield Brook, Upper River Mole, Gatwick Stream, Burstow Stream and Salfords Stream.
The agency says flooding is possible for the Ifield Brook, Upper River Mole, Burstow Stream and Salfords Stream including Ifield, Lowfield Heath, Charlwood, Hookwood, Bewbush, Furnace Green, Maidenbower, Crawley, Horley, Copthorne and Salfords.
These areas are likely to flood into the evening and over night tonight. Low lying land and roads will be affected first. The Environment Agency is warning residents to be prepared.
More top news
Police fired tear gas on migrants as flames lit up the 'jungle' camp on its final night before it is razed and its residents dispersed.
The Government have confirmed the runway decision will be tomorrow. Our Transport Correspondent Mike Pearse looks at the issues.
Monday's weather for the east with Philippa