Authorities are closely monitoring a second newly formed lake as rescue efforts continue. Follow for live news updates.

Most arrive with nothing except the clothes they are wearing. As rescue efforts in communities buried by catastrophic flash floods along the border between Nepal and China entered their fourth day Saturday,

Authorities say casualties could be much higher, alongside heavier losses of property.

Officials have not yet released names of those confirmed dead or still missing, as rescue efforts continue Thursday. But the scale of the tragedy is becoming clear.

Poor weather hampered aerial rescue operations in Nepal as the search for hundreds of missing people in areas devastated by catastrophic flash floods along the border with China entered its fourth day.

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.

Perilous rescue efforts along the China-Nepal border are being complicated by the risk of new flooding or landslides, with authorities in China and Nepal briefly pausing rescue operations Friday due to those fears.