This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing. New users who download our updated app get a seven-day free trial. Hong Kong experienced severe rainstorms because the monsoon provided rich moisture that amplified the residual impact of tropical cyclone Danas, despite its early landfall, the weather forecaster has said. The Observatory’s explanation came after heavy downpours and thunderstorms across the...