The real crisis with water supply is that South Africa doesn't know what it doesn't know.
South Africa's Department of Water and Sanitation has plans in place to ensure adequate water supply until 2040 and beyond.
Cities need to pay attention to how extreme weather events effect their resources.
If the pattern of drought continues in South Africa it's likely to affect the country's financial standing too.
Cape Town's draft strategy on water supply is out for comment, but important elements are missing from it.
Water supply systems weren't designed to deal with altering weather patterns brought about by climate change. This needs to change.
Faced with a drought, it's tempting for cities to reduce the amount of space that needs water. But this is not a good idea.
Cape Town faced down "Day Zero" earlier this year, but that doesn't mean its water system is resilient. Other cities should also take note.
Bangalore's forgotten water wells are being revived, to help the city overcome centuries-old supply issues.
In South Africa, Cape Town fears "Day Zero", when the city will have to ration water drastically. The phenomenon threatens other cities as well but solutions exist.
Small solutions done properly can play a huge role in dealing with water scarcity.
The drought in Cape Town has taught the city some valuable lessons.
In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.
Cape Town is testing new strategies to nudge domestic users into reducing their water use.
There are measures in place to manage Day Zero and beyond. Models show that these will not work.
In periods of water stress, farmers need support, research assistance and empathy from governments and competing water users.
Day Zero will be the start of active water rationing when taps will be cut off and people will have to go to collection sites.
We think of Canada as a water-rich country, but we are not immune to water shortages or disasters. With some advance planning, Canada can avoid a water catastrophe.
The poor management of South Africa's water is affecting the entire country.
Cities all over the world are facing growing challenges to provide clean, reliable water. And many of the fixes, such as desalination plants, have a huge carbon footprint.