On the Italian side, the dividing lines of rivers or lakes are connected to the peaks of glaciers. However, with global warming, many of them are melting and disturbing the balance that has existed for centuries. The route was therefore modified in the area of Tête Grise / Plateau Rosa, Carrel Cabin and Dos de Rollin. In May 2023, a joint Italian-Swiss committee agreed on a project that respects the interests of both parties.
In 2023, the annual report of the Swiss glacier monitoring network Glamos indicates that Swiss glaciers lost 4% of their volume during the year in 2023. This was the largest loss ever recorded after 2022 and their volume is 6% lower.
Trams and cross-border rivers
On the French side, it is the operation of the Geneva trams that is forcing the Swiss government to adjust the border. The line in question connects the municipalities of Perly Certeau in Switzerland and Saint-Julien-en-Genevais in France. The two countries will “exchange equal areas” to ratify the process.
