Nepal-Tibet flood live updates: Rescue teams search for survivors as hundreds remain missing

What to know At least 469 people are dead after catastrophic flash floods Wednesday along the border between Nepal and China's Tibet region, Nepal police said. Hundreds of foreign tourists are among those who remain missing in the area, which is popular with trekkers and pilgrims. In China, where a mudslide hit a land crossing between Nepal and Tibet’s Gyirong county, authorities said three people were dead, two were rescued and 558 others were missing, including 260 foreigners. The State Department says 90 Americans are unaccounted for in Nepal and China, while three have been rescued in Nepal. It said it was not aware of any U.S. deaths. Rescue teams are using military helicopters, heavy machinery and dogs to search for survivors after the surging floodwaters washed out roads, buildings and bridges, cutting off thousands of people. Nepal and China have both warned of further flood risk as two lakes that have formed on either side of their border threaten to collapse. The deadly torrent followed a glacial collapse in the Himalayan region, which is home to many of the world's highest peaks and a high concentration of glaciers. While the exact cause of the disaster has yet to be determined, experts say climate change is causing glaciers to melt faster, increasing the risk of flooding and landslides.

Follow live updates as rescue teams search for survivors of catastrophic flash floods in Nepal and China, where 90 Americans are among hundreds of people unaccounted for.