By Susie Beever A bridge has collapsed and plunged into a river amidst devastating flooding in Brazil which have already claimed the lives of 39 people. The country is seeing its worst freak flooding in 80 years following heavy rains in the southern state of Rio Grande do Sul. Some 68 people also remain missing in the disaster-struck region. Now footage has emerged of a swollen river forcing a road bridge to crumble and collapse. The bridge in Porto Alegre, the state’s capital, was destroyed amidst the deluge. The record-breaking floods have forced thousands from their homes and caused widesca…