Tourists wait in line at the heliport of Air Zermatt for a flight by airlift into the valley to Raron, in Zermatt, on Tuesday, Jan. 9 2018. Due to heavy snowfall and rain showers, Zermatt can only be reached by air. Swiss authorities have closed ski slopes, hiking trails, cable cars, roads and train service into the town of Zermatt amid a heightened risk of avalanches, stranding some 13,000 tourists in the town. (Dominic Steinmann/Keystone via AP), APTOPIX