Trains between Horsham and Barnham may be delayed by up to 30 minutes today (Saturday December 22).
This is due to flooding causing disruption at Arundel.
Southern Rail say this will continue until further notice.
On the roads, surface water has caused problems across the district.
However, at the moment the only road closed in the Horsham district is Northlands Road in Warnham around the Mayes Lane junction.