Cost and lead time of infrastructure (and adequate planning). Systems to do this exist in the country (eg, moving water from Lesotho to the Vaaldam with the Hi

Cost and lead time of infrastructure (and adequate planning). Systems to do this exist in the country (eg, moving water from Lesotho to the Vaaldam with the Highlands water scheme), but that project was 15+ years in the making, and is still ongoing. From what I can see, nothing like this was realistically expected for Cape Town, and thus never planned for.