Authorities in Nepal warned of possible fresh flooding on Sunday and urged residents in flood-affected districts to remain on high alert after water levels rose in the Bhotekoshi River. Flood warning notices were sent to people’s phones early Sunday as rescue teams worked to clear a major highway connecting Kathmandu to one of the areas hardest hit by Wednesday’s catastrophic floods, which killed at least 800 people and left more than 3,000 missing in Nepal and Tibet. The latest warnings came after Chinese authorities informed their Nepalese counterparts of increased water flow upstream, according to Dharam Raj Uprety, executive director of Nepal’s National Disaster Risk Reduction Office and Management Authority. China’s state news agency Xinhua, citing the country’s Ministry of Water Resources, said a new lake formed after Wednesday’s floods high in the mountains had largely drained. But Xinhua said the ministry warned that a crater located 5.6 kilometers (3.5 miles) upstream, containing about 1.4 million cubic meters of water, still posed some risk and required close monitoring. Nepal’s disaster agency said on Sunday that the death toll had risen to 788 with 2,502 missing, while Chinese authorities reported 16 deaths and 546 missing on the Chinese side of the border. The missing include hundreds of people from more than a dozen countries who were in the region to work, visit the mountains or make a pilgrimage to a sacred peak. On Sunday, Chinese state media said 261 foreigners were missing in Tibet, including more than a hundred Nepalis and others from around the world. Some are returning to what was left of their homes. In Dhading, one of the worst-affected regions in Nepal, some residents began returning to ruined homes to see what could be saved. Others scanned the ground for objects they could dig out of the mud and rinse. A man had returned for his chickens and found them alive. He tied them up and put them in the cab of his truck. Get daily national news Get daily Canadian news delivered to your inbox so you never miss the day’s top stories. “Everything is finished. Nothing is left. Not even our house,” Sharmila Tamang, a Dhading resident trying to rescue items from her home, told The Associated Press. At a key power plant that was severely damaged by flooding, workers began inspecting the facility on Sunday to observe the destruction. The plant serves more than 20,000 people in four districts. In the town of Galchhi, a group of residents sought higher ground on a nearby bridge and watched the river roar past. Some pointed out huge boulders washed downstream during previous floods, while others standing on a suspension bridge were warned by whistles. Along the river, houses, vehicles and farm tractors could be seen protruding from the thick gray-brown sediment that in some areas engulfed entire towns. Parts of the rice terraces along the river bank had fallen into the river after being hit by landslides. 2:15 Agonizing wait for BC families of Canadians missing in Nepal Residents receive constant flood warnings. Homes and businesses left intact after the floods were still without power Sunday, while twisted power line poles and cables lay tangled in the mud. Residents of flood-affected villages said they were struggling to understand the near-constant alarms they have received since the initial flooding. “Sometimes they say a flood is coming and then we have to run back to higher ground, even at night. It also rains,” said Govind Shreshta, a resident. “It’s really hard for me. I have a 72-year-old father and a 70-year-old mother. I have to carry them and I’m exhausted. The same goes for those who are still alive.” More about the world More videos Large concrete suspension bridges and smaller ones were destroyed, leaving communities across the river with more difficult access. “Those who are there now are stuck there. Those who are here are stuck here. It’s going to be very difficult,” said Sattan Singh Tamang, 47, who was working near a bridge when Wednesday’s floods hit. Scientists studying satellite images said the bedrock beneath a glacier high in the Himalayan region had collapsed, taking part of the glacier with it. The rockfall was so extreme that it was recorded as a magnitude 5.2 earthquake. Rocks and meltwater caused rivers to swell in the lower valleys, causing a torrent of water that swept away buildings, bridges, and land downstream in Tibet and Nepal. Nepal’s foreign minister called for a global response to climate change, saying Nepal was bearing a disproportionate share of its impact. “Despite contributing only 0.1 percent of global emissions, the people of Nepal have become the main victims of climate change,” Shisir Khanal said on Saturday. 2:09 Brampton husband, father among Canadians missing in Nepal, family waits for answers Scientists have said it’s too early to make a direct connection between global warming and Wednesday’s catastrophe. However, they said that as the Earth’s temperature rises due to human activities such as burning oil, gas and coal, the chances of such disasters increasing, especially in the Himalayan mountains, which are warming considerably faster than many other parts of the world. Meanwhile, Malaysian Prime Minister Anwar Ibrahim said on Sunday that his country will send a search and rescue team to Nepal to assist with relief efforts and help evacuate Malaysians affected by the disaster. Malaysia has also pledged $1 million in financial aid to Nepal, it said in a statement. Associated Press journalists Aijaz Hussain in New Delhi and Shristi Kafle in Kathmandu, Nepal, and video journalist Shonal Ganguly in Dhading, Nepal, contributed to this report.