Sussex was hit with a third of its monthly rainfall in one day as torrential downpours wreaked havoc for commuters.
Motorists battled past flooding on roads across the county, while railway services between Lewes and Haywards Heath ground to a halt after flooding on the track.
It came as a yellow weather warning was issued by The Met Office for rain from midnight until 3pm this afternoon.
Some places in Sussex saw between 30 to 40mm of rainfall over the morning.
The average rainfall for the whole of November is normally around 100mm.
The A23 at Bolney had queues of around three miles which took one hour to get through after a car reportedly drove off the road in rainy conditions at around 7am.
The driver was taken to hospital.
There were other more minor crashes during the morning.
The A27 at Lewes had long delays due to one lane being flooded at the Kingston Roundabout.
There was also minor flooding at the Cuilfail Tunnel into Lewes.
A petrol tanker broke down in flood water at around 5am this morning on the A267 near Cross in Hand, east of Uckfield.
A red flood warning was issued for Buxted, near Uckfield, by the Environment Agency and residents were urged to “act now” due to the River Uck rising fast due to 40mm of rain by around 9am.
People were urged to turn off their gas, water and electricity, move things upstairs or to safety and move family and pets to safety.
Riverside properties in Buxted were encouraged to install sandbags and other flood protection products if they had them.
There was surface water flooding on the A27 west of Arundel and a crash reported in nearby Slindon before 7am.
The A22 near Polegate also had flooding and reports of a car driving into trees at around 9am.
In Brighton, wheelie bins could be seen “floating down the road” in Lucraft Road, Moulsecoomb.
On the seafront, motorists splashed their way through large puddles in Kingsway near the Brighton i360.
Firefighters were called to a home that had flooded in Ringmer just before midday.
Southern Rail reported more flooding in the Wivelsfield area into the afternoon.
A yellow weather warning for thunder is in place from 8pm until 6am tomorrow.
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