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 issued the No 10 hurricane signal at 9.20am on Sunday, and warned that Typhoon Wipha was “posing a considerable threat” to the city as it would skirt about 50km to the south around noon. The No 10 signal, the highest-level warning, means that winds with mean speeds of...