The Australian authorities say they are focusing on protecting water plants, pumping stations, pipes and other infrastructure from the intense bushfires surrounding Sydney. Slightly cooler, damper weather has provided a brief respite to firefighters who have been battling blazes around Australia's biggest city for weeks. But temperatures are forecast to head back towards 40 degrees Celsius early next week and the fires are expected to escalate. This could threaten Warragamba Dam, which provides water to 80 percent of Sydney's 5 million residents.