Four people were buried under debris after severe storms in the Swiss region of Grisons in the south-east of the country. One woman was rescued alive on Saturday morning from the rock debris near the village of Lostallo north of Lake Como, the regional police reported on Saturday. The tourist resort of Zermatt on the Matterhorn in the Swiss Alps was cut off from the outside world due to the risk of flooding. A search was still under way for the other three missing people on Saturday. There have been numerous thunderstorms and heavy rainfall, flooding and a landslide since Friday, the regional …