Brazilian volunteers rush to rescue people stranded by deadly floods

A group of volunteers drive through the flooded streets of the hard-hit southern Brazilian city of Porto Alegre, rescuing stranded residents as they go.

At least 66 people have been killed in raging floods and mudslides affecting the South American country, with more than 80,000 forced to flee their homes in a disaster Brazil's President Luiz Inacio Lula da Silva blames on climate change.