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Rescue teams rushed Thursday to find more than 1,000 people missing on the Nepal-Tibet border in flash floods and landslides that killed at least 165 and swept away entire villages.

A terrifying clip of surveillance video from the Chinese side of the frontier shows a massive wall of mud and debris crashing over a building several stories high on Wednesday morning, engulfing it as dozens of people ran for their lives below. The surge swept away buses and cars like they were toys.

Many of the missing are foreign tourists, officials said of the disaster, which the US Geological Survey believes was caused by a glacial collapse that sent a flow of debris engulfing areas along the way.

The tsunami-like rumble of water and mud struck villages and towns on the path of two rivers — Bhote Koshi and Trishuli, with Nepali police saying they had recovered 162 bodies.