Mimi Lau explains how two months of record-breaking torrential rains and decades of land reclamation and waterway diversion have helped contribute to the ongoing flood crisis in the Yangtze River basin, home to a third of mainland China's population. Field reporter Phoebe Zhang details what she found as she travelled from Wuhan to Poyang Lake and the historic 'ceramics capital' Jingdezhen, reporting on the unfolding disaster and witnessing the response from locals and authorities.