NEW DELHI — Three people died and at least a dozen are feared missing after being swept away in a flash flood triggered by torrential rains in the north Indian state of Himachal Pradesh, local authorities said on Thursday.

A rescue operation has been launched to trace the missing, said Dinesh Sharma, a local government spokesperson in Kangra. The town is about 18 kilometres (11 miles) from Dharamshala, a popular tourist destination known for its Tibetan culture and as the home of Tibetan spiritual leader, Dalai Lama.

Sudhir Sharma, a lawmaker from Dharamshala, said in a social media post that at least 15 to 20 workers resting in a temporary shed near the site of a hydroelectricity power project were swept away after water levels at a local reservoir rose suddenly late Wednesday.

In a status report issued Thursday, the state government confirmed at least eight people were missing in Kangra and three in nearby Kullu. The authorities have evacuated around 50 stranded tourists to safer places in the state.

The state government confirmed three people died, but did not provide details.

Flash floods and cloudbursts are common in India’s mountain states such as Himachal Pradesh during the monsoon season. Deforestation to make way for infrastructure development and expansion of hydel power projects has often led to calls by critics for environmental accountability and disaster preparedness in such states.