The cities are Sao Paulo, Brazil and Cape Town, South Africa, and the maritime sector offers several options for providing potable water to such cities.
Changing Weather Patterns The cities of Sao Paulo and Cape Town depend on prevailing winds to carry humidity from the ocean toward coastal mountains, where the humidity usually condenses into rainfall.
This technology is commercially available and wealthier citizens who live in humid, drought affected regions have invested in such technology.
Authorities in Brazil are evaluating several locations to develop seawater desalination.
The equivalent of flush toilets operated using seawater, with corrosion-resistant plumbing having being made from wood, clay and porcelain.
Brazilian coastal cities such as Belem, Fortaleza and Recife are located close to the Amazon River where water tanker ships could collect potable water.
Long-distance pipelines represent the modern version of the aqueducts and are long-term investments.
Such aircraft can also be used where large bodies of potable water are located in close proximity to drought stricken agricultural regions.
Drought could occur almost anywhere.
Transportation technology and/or pipelines may be suitable for locations where drought stricken regions are in relative close proximity to large bodies of potable water.