Dharamshala, July 27 -- The rainfall activity in Himachal Pradesh is expected to intensify in coming days even as the India Meteorological Department (IMD), Shimla, has sounded an orange alert in various districts of the state from July 28 to 31.

Meanwhile, 135 roads remain blocked across the state due to landslides and flash-floods triggered by torrential rains, on Sunday.They included 54 roads in Kullu district, followed by 43 in Mandi district and 15 in Shimla district.

The weather office had issued an orange alert of heavy to very heavy rainfall in Mandi, Shimla, Solan and Sirmaur districts on July 28, followed by a similar alert on July 29 in Una, Kangra and Sirmaur districts.

For July 30, an orange alert has been sounded in Una, ...