Across the Alps many resorts use artificial snow to ensure holiday makers can continue to ski, whatever the level of natural snow.
At the French resort of Saint Sorlin d'Arves, more than 200 snow cannons are operating at an altitude of 1,600m (5,250ft) to combat the lack of snowfall.
Snow cannons require a lot of water to be pumped through the complex system of pipes that run beside the tracks. Here a rainbow forms in the snow pumped by a cannon.
In some areas snow is shovelled to form a ski run.
Early in the morning, teams are out on the slopes guiding the snow into place.
These maintenance teams use specially equipped tractors to level the snow.
The levellers are guided by GPS-based maps displayed in the comfortable, heated cabins.
On the back of the machine there is a milling wheel to soften the snow while a sort of carpet smooths the surface.
Once the day begins skiers head to the slopes in a free shuttle bus.
The majority of skiers stand in line waiting for the ski lift.
But some make their own way up the mountain.
At high altitude some have a chance to enjoy the sunshine during a lunch break.
With the local economy relying on the slopes to provide income for several months each year it seems the snow cannons are here to stay, despite protests from some environmental groups.
All photographs © John Vink / Magnum Photos.
