Brazil's scorpion infestation, which is terrorizing residents of São Paulo and other major cities, is a classic 'wicked problem.' That means officials must think outside-the-box to fix it.
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.
Hundreds of squatters were living in a vacant police station in São Paulo when fire broke out on May 1, killing up to four people. The residents were part of Brazil's nationwide homeless movement.
Cape Town is testing new strategies to nudge domestic users into reducing their water use.
Luz, a once-elegant 19th-century neighbourhood in downtown São Paulo, is prime real estate. But redevelopment means clearing out a homeless encampment known as "Crackland".
A public health programme respected locally, lauded globally, and based on the best science for helping homeless crack users, is at risk of falling victim to Brazil's partisan politics.
Natural hair has become a political rallying point for women across the African diaspora. For these women, wearing natural hair is way to resist Eurocentric norms and "post-racial" political thought.
The same persistent weather pattern bringing hot, dry conditions to California is likely connected to a punishing drought in the Sao Paulo area in Brazil.
Growth can be predicted and droughts can be planned for. So why did Brazil's largest water utility get caught out?