Pakistan, Aug. 6 -- A powerful flash flood triggered by a sudden cloudburst tore through the Himalayan town of Dharali in Uttarakhand, India, on Tuesday. The mudslide killed at least four people, while more than 100 remain missing. Videos captured horrifying scenes of muddy water crashing through buildings, dragging entire apartment blocks and people with it. As the flood roared through the narrow mountain valley, terrified residents were seen running for their lives before being swept away.

Authorities quickly declared the situation critical, deploying rescue teams "on a war footing" to locate survivors. India's army sent around 150 troops who managed to rescue at least 20 people trapped in the deep sludge. However, the disaster left a ...