Lower Queen St in downtown Auckland has been closed due to a burst water main and the timing couldn't be worse as the city grapples with a drought.
The ruptured pipe will potentially throw public transport into disarray, with buses and other traffic diverted.
Council-controlled Watercare has shut off the road between Fort St and Customs St from about 10am and says it's likely to be closed all day.
It's the same pipe that burst on May 5, causing surface flooding and closing Queen St for two days.
Watercare spokeswoman Mel Verran said a crew was on site this morning and excavating to locate the break in the pipe.