There are measures in place to manage Day Zero and beyond. Models show that these will not work.
The situation in Perth in particular has some parallels to that of Cape Town, but Australian cities responded to the last big drought by investing in much bigger water supply and storage capacity.
Cape Town's new water map shows users who are within the water restriction limit.
Developing a map of African countries' water poverty levels offers a transparent analysis for policymakers, governments and organisations that deal with water issues.
Australian cities have turned to some very costly solutions when water is scarce. But as the world's second-highest users of water per person, more efficient use and recycling are key.
Allegations of water theft have thrown the Murray-Darling Basin Plan into crisis. The solution could involve users declaring their annual water use, subject to random audits - like a tax return.
Modern sewerage infrastructure, exported from Britain to the globe, is entirely dependent on water. In a world of growing climate extremes, it's time to look beyond this colonial legacy.
The globe is greening as plants grow faster in response to rising carbon dioxide. But a new analysis shows they aren't using more water to do it - a rare piece of good news for our changing planet.
Windhoek can teach Cape Town on dealing with drought. Technology alone is not enough.
There is an increasing demand for water in cities like Cape Town. The current drought exacerbates this. But there are ways to use and save water sustainably.
Taps need technology too.
The Colorado River supplies water to millions of people and irrigates thousands of miles of farmland. New research warns that climate change is likely to magnify droughts in the Colorado Basin.
Travelling to work can require as much water as you use at home.
There are loads of things you can do to cut your energy bills - and many don't involve stumping up any cash up-front at all.
Climate change is forcing some hard decisions when it comes to water use: energy or food production?
A new millennium-long record reveals that Australia has suffered longer droughts and wet periods than those recorded in the past century's weather observations.
Water footprinting is meant to help countries use water more efficiently. But it may cause more problems than it solves.
Long-term drought and water shortages in many parts of the U.S. are spurring interest in ways to reuse graywater -- the water that drains from sources such as showers, bathtubs and washing machines.
Despite its long idle, Melbourne's desalination plant plays a vital role in providing water in a drying climate.