The wild storm that ravaged homes, flooded Auckland’s western suburbs and left 400 homes without power has also polluted one of the city’s drinking water dams, resulting in its temporary closure, Stuff reports. The severe rainfall caused landslips in the west which pulled debris and dirt into the catchment, muddying the dam’s waters and blocking its access ways. “Upper Huia Dam appears to have fared the worst in terms of water quality, and we suspect the raw watermain may have been moved by a slip,” Watercare chief operations officer Mark Bourne said.