At least 30 people have died during severe rainstorms in Brazil's Minas Gerais state.
Read moreBrazil dam collapse
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Video caption: Flooding aftermath in Brazil's Belo Horizonte Dozens of people died during recent severe rainstorms in Brazil's Minas Gerais state.
By Katy Watson
BBC South America correspondent, Brumadinho, Brazil
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Video caption: Brumadinho dam collapse - one year on The collapse in Brumadinho, Minas Gerais state, was Brazil's worst industrial accident.
By Jenny Hill
BBC News, Brumadinho and Munich
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Video caption: Brazil disaster: Moment Brumadinho dam collapsed Nearly 300 people died in a mudslide after a dam collapsed near Brazil's town of Brumadinho in January.
By Will Grant
BBC News, Barão de Cocais, Brazil
By Daniel Gallas
BBC South America Business correspondent
Dam fears
Copyright: Getty ImagesImage caption: The breaking of the Feijão dam, in the town of Brumadinho, last month drove a torrent of mud downriver sweeping all before it Areas around two dams in Brazil have been evacuated.
Brazilian company Vale has evacuated around 500 people from a dam area in the Gongo Soco mine in the state of Minas Gerais as a preventive measure.
Residents of an area close to an Arcelor Mittal dam, also in Minas Gerais, have also been evacuated.
Last month, a Vale dam collapsed and left hundreds of people dead and missing in the town of Brumadinho.
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Video caption: Brazil's mining dams: A disaster waiting to happen? The BBC's David Shukman explains what led to the Brazil dam collapse that killed hundreds of people, and how likely it is to happen again.
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Video caption: Brazil's mining dams: A disaster waiting to happen? How a torrent of toxic sludge buried buildings in Brumadinho - and the risk of it happening again.
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Video caption: 'I was in my truck as the mudslide hit' When the Brumadinho dam collapsed, a huge mudslide headed straight for Elias Nunes' truck.