Flood waters have inundated scores of villages in Assam, leaving nearly 500,000 people homeless, an official said on Monday.

At least one person has died in the floods, a 55-year-old man who drowned when his boat capsized in Assam state, said Mantu Thakuria, a police officer. It was the first death reported in the state since the rains began last Wednesday.

Nearly 500,000 people have been displaced by the floods, which have affected 10 of the state's 27 districts, Assam's Revenue Minister Bhumidhar Barman said. They include nearly 100,000 people marooned on Majuli island in the Brahmaputra River.

On Sunday, the overflowing river washed away five villages, forcing nearly 4,000 residents to flee to makeshift relief camps, said Barman. The area is nearly 130 kilometres east of Guwahati, the capital of Assam.

Last week, the Brahmaputra breached a 328-foot (100-meter) stretch of a newly built embankment. At least 300 villages in Lakhimpur district, about 220 miles (350 kilometres) north of Guwahati, have been inundated.