Shimla: Moderate to heavy rains affected parts of Himachal Pradesh, including state capital Shimla, with landslides causing significant damage in Chamba district where about a dozen vehicles and many houses were buried in debris. The Met office on Tuesday said there was a moderate flash-flood threat in a few watersheds and neighbourhoods in seven out of 12 districts in the state, namely Chamba, Kangra, Kullu, Mandi, Shimla, Sirmaur and Solan, in the next 24 hours. An orange warning was issued for heavy to very heavy rains in isolated areas of four to five districts of Himachal Pradesh till July 30 and on August 3. In Bhariad village in Chamba, many families were forced to evacuate their houses after the seasonal rivulets suddenly changed course. There were reports of about a dozen vehicles, including cars, trucks and two-wheelers, being buried under debris following a landslide near Bhariad on Udaipur-Golthi-Navodaya road.