Massive flooding and mudslides in north-eastern India’s Assam state have claimed eight more lives, officials said on Sunday.

It takes the death toll from weeks of heavy rain that caused one of Asia’s largest rivers to overflow to 62.

Assam’s disaster management agency said 32 of the state’s 35 districts were underwater as the swollen Brahmaputra River broke its banks, displacing more than three million people.

The Indian army was called in for rescue efforts and the air force remained on stand-by.

The Brahmaputra flows from Tibet through India and into Bangladesh on a nearly 500-mile (800km) journey through Assam.

On Sunday, four people went missing when a boat carrying nine capsized in eastern Assam’s Dibrugarh district, 310 miles (500km) east of Gauhati, the state capital.

Police said search operations were continuing but they were hampered by strong currents.

Forecasters are expecting a respite from the rain after incessant downpours.

On Saturday, Assam’s Chief Minister, Himanta Biswa Sarma, toured flood-hit areas and described the situation as grim.

“We are now focusing on relief and rescue operations,” he said, adding that more than 20,000 people have been evacuated by the army and other rescue agencies.

Annual monsoon rains hit the region in June-September. They are crucial for crops planted during the season but often cause extensive damage.

Flooding from swollen rivers has also spilled over to neighbouring Bangladesh, where the government said the situation is likely to deteriorate in the worst-hit Sunamganj and Sylhet districts in the north-east as well as in the north.

Lightning strikes in parts of Bangladesh have left at least nine dead since Friday.