U.S. officials report about 90 U.S. citizens remain unaccounted for after catastrophic flash floods hit a border area of China and Nepal. Wednesday's flooding killed hundreds of people. The U.S. State Department says it's not aware of any U.S. deaths, but three Americans have been rescued. Many of the missing were on a pilgrimage to Mount Kailash in Tibet, a sacred site for Hindus and Buddhists. Indian spiritual guru Jaggi Vasudev, also known as Sadhguru, says 77 people from his Isha Foundation were at an immigration center in Tibet when the floods struck. The Isha Foundation told ABC News that 22 of those 77 were Americans.

Mount Kailash, a Himalayan peak in Tibet, is sacred to several religious traditions and draws pilgrims from across the region. Pilgrims traditionally walk around the mountain rather than climb it, completing a roughly 33-mile (53-kilometer) circuit as a religious practice, while nearby Lake Manasarovar is also a site of spiritual purification. Hundreds of foreigners were among those reported missing after catastrophic floods struck the Nepal-China border region, including Indian nationals on pilgrimage to Mount Kailash.

A 73-year-old retired nurse spoke her native Tibetan all her life but never learned to write it — until now. Her decision offers a glimpse into how some embrace their language and cultural identity in Tibet, a region that is autonomous but tightly controlled by Beijing. China's new “ethnic unity” law mandates Mandarin as the primary language for schools and government. Critics argue the law forces assimilation and erodes the rights of Tibetans and other minorities. Beijing says the policies improve educational opportunities and ensure equal access for ethnic minorities. In Tibet, reminders of Chinese control are everywhere, from billboards to flags. Some Tibetans, like the retired nurse, are finding ways to preserve their language and culture amid the changes.