Hong Kong is bracing for Typhoon Roke with winds reaching 73 km per hour, forcing authorities to shut some services and events in the Asian financial hub. <br/><br/>The Hong Kong Observatory this morning raised its typhoon signal to 8, one of its highest warnings which rate typhoons up to 10, as Roke is expected to make landfall over the eastern part of the city. <br/><br/>When a typhoon 8 signal is in place businesses, government offices and schools stay closed, including banks, port operations and the Hong Kong stock exchange.