Heavy snowfall and a high avalanche risk have brought parts of Valais to a standstill.
Many roads are closed and several mountain villages are only partially accessible.
In Zermatt and Saas-Fee, disrupted supply chains have led to panic buying and empty supermarket shelves.
One resident in Zermatt says deliveries to Migros have been halted because no trains - not even freight - can get through.
Shoppers are stocking up on food that can be eaten without cooking, after brief power cuts.
In Saas-Fee, visitors report bare shelves at Coop and silent ski lifts, with avalanches heard in the distance.
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