That last paragraph, literally following the statement before it just makes me mad :
"But there is a sense that much of this technology is merely tinkering at the edges. The overarching issue is the potentially devastating effect of global warming on water availability and how we, collectively, endeavour to tackle it."
Unfortunately this statement is absurd. The real cause:
"Most recent projections suggest that its water could run out as early as March. The crisis has been caused by three years of very low rainfall, coupled with increasing consumption by a growing population."
So an extremely rare event is causing a water shortage. How has climate change affected this ? Well, it has moved the average of the distribution of rainfall by a few percent (at most).
How far are we from the average ? Close to 3 sigma away from it, and increasing every day. If the city actually runs out of water we'll be closer to 4 sigma before it happens.
So how much influence does climate change have on it. Opening my python client I feel like it can be distributed as such:
1) 99.99999% is a coincidence (a series of unrelated events spanning 4+ years causing a lack of rainfall in the area)
2) 0.00001% is climate change
In other words, if you solved climate change today, nothing at all would change for this city. And yet that claim from the BBC gets inserted there.