The temporary embankment of the new spillway of Attabad Lake was destroyed through bombing on Monday.
A high alert was declared in Hunza and people in nearby villages were evacuated. The local residents moved to higher grounds while police force was deployed at routes leading towards lower areas and River Indus.
Karakoram Highway was closed for traffic and boat service was also suspended in the lake. According to the Commissioner Hazara Division, the water level in the River Indus can rise due to the opening of the spillway.
Official sources state that with the opening of the spillway, 50,000 cusecs of water will be released which may lead to floods.
Section 144 was imposed in the district, educational institutions were closed and holiday was declared in government offices as precautionary measures.
