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South of Zermatt, power outages were reported in 37 of the 74 municipalities in the Aosta Valley in north-west Italy, and a bridge collapsed in Biella in nearby Piedmont.

They first meet in the summer of 1984, when Pietro’s parents — the family lives in Turin — rent an apartment in a village in the Aosta Valley, a shockingly beautiful swathe of the Italian Alps that borders both France and Switzerland.

“This is particularly true of inner-Alpine dry valleys such as the Aosta Valley in northwestern Italy, already affected by significant water stress.”

Now regions such as Val d'Aosta in the far north of Italy, famous for its ski resorts and mountains, can produce their own oil.

On June 21, the country lifted its midnight curfew in all regions except for Valle d’Aosta, on the French and Swiss border.