I have no idea what they mean by T10. it has 103 MPH and is Category 3 as I know them supposed to be 2 when it makes landfall in China..
So I am sorry I thought you were joking, even a Category 2 storm is not a joke maybe T10 means a serious warning or something for Hong Kong it is not a system I have ever seen here.
Anyway it does state that "More than 550 flights have been canceled at airports in Hong Kong, Shenzhen and Guangzhou, and more than 200 have been delayed, according to Flightaware.com. Most of Hong Kong's public transport has been suspended." so I guess nothing will ship from Hong Kong for a day or so it is under this warning
Ok I looked and found it what a complex and convoluted history for these signals in Hong Kong and region:
https://en.wikipedia.org/wiki/Hong_Kong_tropical_cyclone_warning_signals
and here is meaning of 10 at bottom of chart below history of these:
No. 10 signal gives warning of a hurricane force wind. Hurricane force winds range upwards from 118 kilometres per hour but gusts may exceed 220 kilometres per hour. This signal implies that a typhoon centre will soon pass over or very close to Hong Kong, and hurricane force winds can be expected anywhere near sea level in Hong Kong within a short time of the issuance of the signal.
It is advisable to stay indoors to avoid flying debris. If premises are buffeted by hurricane force winds, all internal doors should be kept tightly shut to lessen the chance of windows or air-conditioning units being blown out or sucked in. It may be useful to reinforce some windows with heavy furniture, props, bars or even mattresses. If people have to go out, they should keep clear of overhead wires and hoardings.
Typhoons can cause the tide to rise much higher than normal. There storm surges may occur in enclosed inlets can cause serious flooding of low-lying land. Heavy rain may also cause flooding. Landslides may occur and some buildings may collapse. If you are advised to move to a safe place, it is essential to remain calm and co-operate with the rescue service.
Should the eye of a typhoon pass over some part of Hong Kong, a lull may occur, lasting for a few minutes or even some hours. This will be followed by the return of hurricane force winds from a different direction. It is necessary to be prepared for the sudden change in wind direction because places that were well sheltered earlier may now become dangerously exposed.
