Villagers use a makeshift bamboo bridge to move across flooded areas of Morigaon district in the northeastern Indian state of Assam August 20, 2014. The latest heavy rains have caused landslides and floods in many parts of India and Nepal, where at least 90 people have been killed since Thursday. (Photo by Reuters/Stringer)

Dupura Akhtar cooks inside her flood-affected house in Ashigarh village, about 70 kilometers (44 miles) east of Gauhati, India, Thursday, August 19, 2014. Heavy rainfall for the past few days has affected several districts of Assam state, flooding dozens of villages and displacing thousands. (Photo by Anupam Nath/AP Photo)

Villagers with their belongings move to safer places through the flooded areas of Morigaon district in the northeastern Indian state of Assam August 19, 2014. The latest heavy rains have caused landslides and floods in many parts of India and Nepal, where at least 90 people have been killed since Thursday. (Photo by Reuters/Stringer)

A mother walks her children through floodwaters as a man takes out a snake killed in flooding in Morigaon district of Assam state, India, 17 August 2014. At least 13 people were killed and 500,000 affected by swirling river waters in northern India after neighbouring Nepal released waters from its barrages following monsoon flooding, officials said. (Photo by EPA/STR)

Picture made available on 18 August 2014 showing villagers crossing flood waters in the flood affected Morigaon district of Assam state, India, 17 August 2014. (Photo by EPA/STR)

A woman walks through flood-affected houses in Burhaburhi village, about 70 (44 miles) east of Gauhati, India, Thursday, August 19, 2014. Floodwaters are receding in some areas but authorities said they had to be vigilant against water-borne diseases. (Photo by Anupam Nath/AP Photo)

Picture made available on 18 August 2014 showing a man inspecting his submerged dwellings in the flood affected Morigaon district of Assam state, India,17 August 2014. (Photo by EPA/STR)

Picture made available on 18 August 2014 a man taking valve traps for fishing in the flood affected Morigaon district of Assam state, India,17 August 2014. Dozens of people were killed and more than a million affected as floods driven by torrential monsoon rains ravaged India's northern and eastern states as the monsoon season in India usually lasts from June until September and exacts a heavy toll, both in terms of human lives and destruction of agricultural crops and property. (Photo by EPA/STR)

Picture made available on 18 August 2014 showing a boy carrying his bicycle through floodwater in the Morigaon district of Assam state, India, 17 August 2014. (Photo by EPA/STR)

A wife and husband collect drinking water from a well source which is half submerged by flood water in the flood affected Morigaon district of Assam state, India, August 18, 2014. (Photo by EPA/STR)