Violent storms and flooding have hit south-eastern France, killing at least 16 people with three more missing, officials say. Three elderly people drowned when their retirement home near the city of Antibes was inundated with floodwater.

Others died trapped in their cars in tunnels and underground car parks as the waters rose.

French President Francois Hollande announced a state of “natural disaster” in the affected region.

He thanked rescuers and expressed the “solidarity of the nation”.

President Barack Obama earlier declared a state of emergency in South Carolina.

The US state of South Carolina remains on high alert amid widespread flooding that has cut power to thousands and forced road and water rescues.

Emergency officials urged residents to stay indoors unless their homes were in danger of flooding and not to drive.