More than 100 people are missing and at least one has died after devastating flash floods in the northern Indian state of Uttarakhand.

Rescue operations are under way in Uttarkashi district after a massive wave of water surged down the mountains into Dharali village on Tuesday, submerging roads and buildings in its path.

About 190 people have been rescued so far in the affected region, Uttarakhand Chief Minister Pushkar Singh Dhami said.

A cloudburst is an extreme, sudden downpour of rain over a small area in a short period of time, often leading to flash floods.

Damaged roads and heavy rain have hampered rescue teams trying to reach Dharali. Dhami flew in by helicopter on Wednesday and met some of the affected families.

Weeks of heavy rain have pounded Uttarakhand, with Uttarkashi - home to Dharali village - among the worst hit by flooding.

The floods struck on Tuesday around 13:30 India time (08:00 GMT), causing the Kheerganga river to swell dramatically and send tonnes of muddy water crashing down the hills.

Dharali is a summer tourist spot 2km from Harsil, home to a major Indian army base and an Indo-Tibetan Border Police camp. At least 10 soldiers stationed at the army base are also missing, officials said.

Rescue efforts are slow due to heavy sludge and debris, but officials have deployed helicopters to aid operations.

The sludge has also blocked part of the Bhagirathi river - which becomes India's holiest river Ganges once it travels downstream - forming an artificial lake that has submerged large areas, including a government helipad.

Officials worry that if this water is not drained out quickly, it can pose a serious threat to towns and villages downstream.

India's weather department has forecast heavy rain ahead and advised avoiding landslide-prone areas. Schools have closed in parts of the state.

In the past few days, officials had issued multiple rain alerts, discouraging tourists from visiting the region.

Dharali sees fewer visitors in monsoon season. The low footfall and warnings likely kept tourists safe during the deluge. Residents warn that a full crowd could have turned the incident into a far worse disaster.

Uttarakhand, located in the western Himalayas, is highly vulnerable to flash floods and landslides.

In 2021, more than 200 people died in flash floods triggered by a cloudburst.

One of the worst disasters to hit Uttarakhand was in 2013, when a cloudburst caused devastating floods and landslides that destroyed several villages and towns. Much of the damage took place in Kedarnath town, which is popular with Hindu pilgrims. Thousands of people were swept away, and many bodies were never recovered.