If "Day Zero" does arrive, many people would have to go to collection points guarded by security forces for a daily ration of 6.6 gallons.
DA leader Mmusi Maimane announced on Tuesday that "day zero" - the day the taps are turned off - for the drought-stricken City of Cape Town has been pushed back to April 16.
Cape Town residents are also asked to keep showers to two minutes, use hand sanitizer instead of water, refrain from watering lawns and to avoid flushing toilets on a regular basis.
In a "two-way conversation", some diplomats who met officials managing Cape Town's crisis referred to water shortages in their own countries, including in Barcelona, Spain and the USA state of California, said Tim Harris, CEO of Wesgro, an agency that promotes tourism and trade in Western Cape province.
But with climate change growing increasingly more severe such events could be the new normal for major cities, a non-profit climate organisation has claimed.
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"I think a lot of cities are going to go through challenges like this", said Tim Harris, CEO of Wesgro, which is an agency that promotes tourism and trade in Western Cape Province.The authorities now hope for seasonal rains and are working to extract water from other sources and procedures, including desalination.
"We have managed to push back day zero by cutting consumption to an average of 580-million litres a day for the past week to 540-million litres a day for the past few days‚" he said. Hotels have removed bath plugs and are asking guests to reuse towels, to reduce the laundry loads.
Cape Town might have to turn off most taps by April 12. Tourist support more than 300,000 jobs in Cape Town.
While tourism officials say there have been cancellations, Ed Roman, Britain's consul general, tweeted earlier this month that there were thousands of British visitors in the area.