More flooding has been predicted as heavy rain is expected to hit an already storm-battered Cornwall.
Prime Minister David Cameron promised the county as much help as it needed to get back on its feet after residents woke to find their homes and businesses under several feet of muddy water.
Earlier, a clean-up operation got under way to removed inch-deep mud and debris from people's homes.
Weather forecasters are predicting more heavy showers - although not as severe as Tuesday night - and the Environment Agency warned of the risk of further flooding.
The heavy rains and gale force winds brought misery to St Austell, Lostwithiel, St Blazey, Bodmin, Par, Mevagissey and Luxulyan.
There were no reports of serious injuries but police declared the flooding a "major incident" with scores of residents evacuated, schools closed, the transport network hugely disrupted and train services stopped by a landslide at Lostwithiel. In Mevagissey 100 properties were flooded.
Eco-attraction the Eden Project, near St Austell, was also closed and is not likely to open again until the weekend.
Mr Cameron said Cornwall had suffered a "very difficult night".
"I know that everyone is working around the clock to get this sorted," he said during Prime Minister's Questions.
"We have said we stand ready to help in any way we can."