The deaths were announced in a short statement issued by the interior ministry, which did not provide details on how or where the people died.
It said that more than 2,000 rescue workers had been mobilised to help the region get through the extreme weather, and that they had made a total of 1,773 interventions.
The main train line between Montpellier and Barcelona will remain shut for at least a fortnight due to flooding, officials said, as southern France began cleaning up the damage caused by torrential rain. TGV trains between Montpelier and Perpignan and Toulouse were also still not running on Thursday, but local TER services were getting back to normal.
In the Béziers region, two metres of water fell in less than six hours on Wednesday – the equivalent of two and a half months worth of rain, the weather service Meteo France said.
It had warned that gale-force winds raised the possibility of high waves swamping parts of the coastline.
The seafront in Nice, which like other Riviera cities was lashed by the storm as it moved eastwards. Photo: AFP
Parks in the city were closed and a tramline was shut down over fears that trees might collapse onto it.
The Bouches-du-Rhone, Var and Vaucluse departments were placed on orange alert joining six other departments in the south of France following flooding overnight which closed some road networks along the coast and which also forced some people to evacuate their homes.
The high alert was lifted on Thursday, with only the Haute-Corse department still on storm watch.
A flooded street in Gruissan, near Narbonne. Photo: AFP
On Tuesday afternoon, 150 people were evacuated from the Le Pavillion campsite in Sigean because of safety fears before the area was hit by the full force of the storm. In total around 1,000 people were evacuated as the storm approached southwest France.
A rescue team a helicopter flies over flooded areas in Villeneuve-les-Beziers near Beziers. Photo: AFP/SECURITE CIVILE/SDIS34
The storms caused road closures, uprooted trees and ripped off roofs in towns and villages across the region on Wednesday.
Ten départements were put on orange alert – the second highest alert level – for heavy rain, high winds and localised flooding.
The extreme weather then moved eastwards, lashing Marseille and the Provence region.
A vehicle drives through flood waters in Beziers. Photo: AFP
TER local train services between Toulouse, Montpellier and Perpignan were suspended on Wednesday but were mostly running again on Thursday.
But there was bad news for the major line that runs between Montpellier and Spain. The SNCF rail company said it would not reopen until November 4th due to damage caused by the storm.
Only Corsica remained on high flood alert on Thursday. Photo: AFP
In the Hérault department, a woman was found unconscious in a vineyard after she fled her house in a panic during the storm.
She was taken by helicopter to hospital.