Brazil flooding claims four

Four people have been killed and an unknown number are missing after heavy rainfall caused a dam to breach in Piaui state, in north-east Brazil.



State governor Wellington Dias has described the flooding around two towns, which reached up to the level of three-storey buildings as a tsunami.



Brazil\'s TV Globo has reported that almost 50 billion litres of water escaped in less than an hour, devastating the valley below.



The search for missing people is due to resume today.