FILE- In this Aug. 18, 2017 file photo, the carcass of a tiger lies in floodwaters at the Bagori range inside Kaziranga National Park in the northeastern Indian state of Assam. Devastating floods triggered by monsoon rains have killed more than 950 people and displaced close to 40 million people from their homes across northern India, southern Nepal and northern Bangladesh in recent days. (AP Photo/Uttam Saikia, File)

FILE- In this Aug. 18, 2017 file photo, the carcass of a tiger lies in floodwaters at the Bagori range inside Kaziranga National Park in the northeastern Indian state of Assam. Devastating floods triggered by monsoon rains have killed more than 950 people and displaced close to 40 million people from their homes across northern India, southern Nepal and northern Bangladesh in recent days. (AP Photo/Uttam Saikia, File)

PATNA, India (AP) — Devastating floods triggered by seasonal monsoon rains have killed more than 950 people and affected close to 40 million across northern India, southern Nepal and northern Bangladesh, officials said Thursday.

The rains have led to wide-scale flooding in a broad arc stretching across the Himalayan foothills in the three countries, causing landslides, damaging roads and electric towers and washing away tens of thousands of homes and crops.

The northern Indian states of Bihar, Uttar Pradesh, West Bengal and Assam in the remote northeast are the worst hit, accounting for 680 deaths, most of them from drowning, snake bites or landslides.

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South Asia’s monsoon rains run from June to September.

Disaster management authorities in Bihar said the state’s death toll of 367 could go up further as floodwaters recede and bodies are recovered from submerged houses.

Army soldiers and volunteers have evacuated around 770,000 people from inundated areas. Of these, some 425,000 were living in 1,360 relief camps set up in school and government buildings, said Avinash Kumar, a Bihar state official.

In neighboring Uttar Pradesh, the state government said around 2.3 million people in 25 districts have been affected by the floods when at least three major rivers overflowed their banks, entering fields and homes.

An Uttar Pradesh government spokesman blamed the unprecedented flooding on the release of water from dams in upstream Nepal.

“Rains have been intense but the release of water from Nepal has aggravated the situation,” said Manish Sharma.

Army troops have been helping to evacuate people marooned on rooftops or trees, while air force helicopters dropped packets of food, drinking water and medicines to those camping on higher ground, mostly along highways.

Meanwhile, the state administration was bracing for the threat of infections as floodwaters recede. Health workers have begun sending supplies of mosquito repellent, bleaching powder and water purification tablets to the worst-hit areas, said health official Badri Vishal.

In the eastern state of West Bengal, the top elected official, Chief Minister Mamata Banerjee, said 152 people had died and 15 million had been affected by floods in the past few weeks.

Another 71 people were killed in Assam as rivers breached their banks and entered low-lying villages. At the renowned Kaziranga National Park, officials said around 300 animals, including around two dozen rhinos and a Royal Bengal tiger, have been killed after floodwaters submerged nearly 80 percent of the wildlife park.

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In neighboring Bangladesh, the death toll climbed to 132 while some 7.5 million people have been affected in this year’s floods, according to the Disaster Management Ministry.

Crops on more than 10,000 hectares (24,710 acres) of land have been washed away while another 600,000 hectares (1,482,600 acres) have been damaged, posing a serious threat to food production, the ministry said Thursday.

The U.N. World Food Program said that Bangladesh was at risk of “devastating hunger” after major floods that destroyed crops, homes and livelihoods of people across many impoverished areas in a delta nation of 160 million people.

“Many flood survivors have lost everything: their homes, their possessions, their crops,” Christa Rader, WFP’s Bangladesh country director, said in a statement. “People need food right now, and the full impact on longer-term food security threatens to be devastating.”

Nepal’s Home Ministry spokesman Ram Krishna Subedi said floodwaters were receding and rivers were returning to normal.

The death toll from the floods in Nepal stood at 146, with about 30 missing.

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George reported from New Delhi. Associated Press writers Julhas Alam in Dhaka, Bangladesh, Binaj Gurubacharya in Kathmandu, Nepal, and Biswajeet Banerjee in Lucknow, India contributed to this report.