I have received the following by email from the Government Flying Service:
In the group I manage we only do very occasional very light stream trekking, and never when it is or has recently been raining significantly. Looking at resources online it is clear that the Wong Lung Hang stream trek is extremely challenging, even in dry conditions, with some dangerous cliff climbing. Anyone who attempts it in the rain and in the dark is utterly insane in my opinion, and also extremely selfish in putting the rescue services at risk when they need assistance.I am the Flight Operations Manager for the Government Flying Service. I am trying to pass the word about an area on Lantau Island that has been a "Black Spot" for hikers recently and would like to enlist your help in making your members aware. We have been called out 6 times in the last couple of months to hikers in the Wong Lung Hang stream area on Lantau to rescue hikers, usually at night. One person died after falling in the stream and sustaining a head injury. The area is difficult for helicopters by day and a nightmare by night so the Fire Service or Mountain Rescue teams usually have to deal with the matter.
The area is steep and heavily wooded, the stream is dangerous when it rains; in short, please ask you members to avoid it and pass the message on to their friends. It may save a life.
J D EVANS
Flight Operations Manager
Government Flying Service
I'm aware that several serious hikers / adventurers / stream trekkers frequent these forums, so please take note and pass the word.
(Just to be clear, this doesn't refer to the Wong Lung Hang Country Trail, although sections of that are fairly treacherous in the wet, and would be very dangerous in the wet at night.)