Holly Chik looks at how this year’s heatwaves in China presaged the announcement of an El Nino weather cycle. Shanghai-based sustainability expert Richard Brubaker analyses the challenges to secure water, food and power supplies. Siqi Ji reports on the ongoing drought in Yunnan province threatening China’s massive hydropower scheme that supplies its industrial heartland, and Echo Xie reports on a new type of climate disaster – the flash drought – and what it means to the world.