10 years is of course too short a period to prove Global Warming, but I can say that in the last decade Lausanne Switzerland is certainly warmer.
For example Agata and Marcus sometimes attend an open air gym.
Outside slack lining. That is quite normal
Outside swimming in the lake, yes, fine in the summer
However, it is now so reguarly warm that I now see scheduled teaching classes in a local park!
Tropics, yes they are coming to us, just give it time.