This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing. Hong Kong’s weather forecaster has warned of severe downpours and serious flooding in Yuen Long under the amber rainstorm signal. The Hong Kong Observatory, which issued the signal at 5.30am on Tuesday, said hourly rainfall in the northwestern New Territories district was expected to exceed, or had already exceeded, 100mm. “There is a severe rainstorm in Yuen