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.
Growth can be predicted and droughts can be planned for. So why did Brazil's largest water utility get caught out?