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. The Hong Kong Observatory says it is assessing the need for issuing the No 10 hurricane signal, minutes after raising the alert to a No 9 storm warning as Typhoon Wipha is edging its way towards the city. The No 9 signal was raised at 7.20am on Sunday, seven hours after the first No 8 warning...