Rain-swollen rivers yesterday spilled mud-brown waters across swathes of Sydney, swamping homes and roads while forcing thousands to flee. Emergency services have now instructed about 50,000 people to evacuate or to prepare to escape the rising waters in New South Wales, officials said. Emergency workers carried out 22 flood rescues in Sydney overnight with the support of 100 army troops, they said. The floods, heavy rain and powerful winds led to power cuts for 19,000 homes, officials said. Australia has been at the sharp end of climate change, with droughts, deadly bushfires, bleaching event...