Sydney’s iconic blue harbour has turned brown in the aftermath of the devasting eastern Australian rain bomb weather system. Waterways and beaches around the city have been filled with sewage, debris, and other sources of pollution through stormwater systems and overflowing waste systems causing the water to change colour from its usual deep blue. “It’s not just the local stormwater that’s polluting our beaches, but it’s the murky water from the flood-affected inland areas,” manager of the NSW government’s Beachwatch program, Meredith Campey, told The Guardian. “It’s flowing downstream into the ocean.” The New South Wales state environment department has issued pollution warnings for all Sydney beaches stretching from Palm Beach in the north down to Cronulla in the south. “Due to recent extreme wet weather conditions and flooding events, stormwater pollution may be impacting many swimming sites,” the warning said. “Avoid swimming if you can see signs of pollution such …