Heavy rains that buffeted Brazil's Rio de Janeiro state this weekend have killed at least 11 people, according to the state fire service.

The rains flooded streets, the capital city's metro line and peoples' homes, bringing down trees and causing landslides.

Rio's Mayor Eduardo Paes announced a state of emergency while President Luiz Inacio Lula da Silva's government offered federal support.

Firefighters are still looking for one woman who is missing after her vehicle fell in a river.