Sitting on a salvaged sofa in the centre of her small tin shack, Nomfusi Panyaza looks increasingly worried, as heavy clouds gather in the sky outside. “When it rains, the public toilets overflow into my living room,” she says. “Water comes in through the ceiling and the electricity stops working.” Outside her makeshift home in the sprawling township of Khayelitsha, on the eastern edge of Cape Town, barefoot children play on the banks of an open sewer, while cows roam next to an overflowing rubbish heap. Panyaza shares this tiny cabin with her two daughters and four grandchildren, a family...