CCTV footage from Gyirong Port in Tibet shows a massive flash flood surging through the area, which then crossed into Nepal's Rasuwa district, causing widespread destruction along the Bhote Koshi River.

Videos shared by Nepal Police and others on social media showed torrents of muddy water crashing through mountain valleys in the Himalayan nation's districts bordering Tibet.

Nepal's government denied that it had ordered the change, though the country is acutely aware of how sensitive the issue of Tibet is to its giant northern neighbour China.

Former Member of Parliament from Ladakh and BJP National Council Member Jamyang Tsering Namgyal drew attention to the Demchok-Dumchele corridor, a trans-Himalayan route that for centuries connected Ladakh with Western Tibet.

Traders have welcomed the reopening of trade through the Nathu La Pass, which lies along the historic Silk Route and was once an important hub for commerce with Tibet.

Nineteen Indo-Tibetan Border Police (ITBP) personnel, who had lost contact with their base from a forward area outpost during flash floods since Sunday in Kurung Kumey district, have reached the base camp.

China is building the world's largest hydroelectric dam in the lower parts of the Yarlung Tsangpo River in Tibet, about 50 kilometres from the border with India.

China's dry Tibetan plateau simply cannot compete with India's massive monsoon downpour when it comes to water volume

Palden Dhondup said the Dalai Lama's birthday celebrations came at a difficult time for Tibetans because of "Chinese policies aimed at minorities"

The Dalai Lama was born on July 6, 1935 to a Tibetan farming family in the small village of Taktser, located at Amdo in Tibet.