Teams of doctors have opened health clinics in the 770 relief camps that had been set up across Assam, one of India's main tea-growing states. The hilly tea growing areas have not been affected, but lower rice fields have been washed away.
Thousands of cattle have perished after being swept away by the raging water or getting stuck in the mud. The stench of rotting animal carcasses was adding to the woes of the people in tents at the relief camps, said officials.
In the worst-hit Dhemaji district, raging waters of the Brahmaputra River swept away entire villages.
Officials said the entire Majuli island, one of the world's largest river islands, was awash as the Brahmaputra rose above the danger level.
"This is one of the worst floods to hit Assam," Singh said. He announced the national government would give immediate assistance of 5 billion rupees ($90 million) to the state.
Railway workers were working round the clock to restore train services disrupted after railway tracks became submerged. "Restoration of the railway line is a priority," said Singh.
The situation was expected to improve over the next few days as the rain was tapering off and water was beginning to recede.
Monsoon floods hit Assam, with a population of 26 million people, almost every year, with heavy rains swelling the Brahmaputra and its innumerable tributaries that crisscross the state.
Intellpuke: You can read this article by Associated Press writer Wasbir Hussain, reporting from Tauhati, India, in context here: www.guardian.co.uk/world/feedarticle/10317981