Apple Watch 2 - dead screen

Thanks for your suggestions. Not sure what happened but after several attempts at recharging and resetting it has come back to life. I will keep my fIngres crossed as I am on a 90 day cruise and taking it to an apple repair centre is not much of an option. I will keep you posted if anything untoward happens again. I have to say that it was a bit scary when the thing started getting hot for no obvious reason.

IT has kind of started working again but there are a number of issues that weren't there before.

1. I cannot get the watch to unlock from my phone (this worked fine before). I have restarted both several times and each device shows that the iPhone unlock function is set (ie green) but the watch will not unlock automatically when the iPhone is unlocked.

2. When I used to track an activity (walk in this case) it used to tap me at each km and by lifting the watch I could see a progress report - now it taps but not progress report. In fact to stop the tracking I have to unlock the watch manually before I can stop and save it.

I have re-paired and restarted each device multiple times ( single button, double button and draining the battery restarts on the watch) with the same result. As I am cruising on South America not much opportunity to go to an Apple Store for help.

appreciate any advice.

The watch was in a cool place, point is that the heat was being generated by the Watch itself. It appears dead at the moment. I let it cool down and put it back on the charger, no life yet.