‘Tsunamis in the sky’: Inside the silent rise of killer lakes in the heart of Himalayas

Produced by: Manoj Kumar

Lakes Exploding

Across the Himalayas, thousands of glacial lakes are swelling—and bursting. Melting ice is turning valleys into ticking time bombs, with flood risks rising every year.

Danger Multiplies

In India’s Himalayas alone, over 190 glacial lakes are now considered high-risk. They’re dammed by crumbling debris walls that could collapse without warning.

Disaster in Sikkim

In 2023, a wall of icy water from South Lhonak Lake swallowed bridges, barracks, and lives in minutes. The wave hit with the force of a tsunami—and almost no one saw it coming.

Floods on Repeat

Glacial lake floods have surged fivefold since 1950. The last 50 years alone account for 70% of all recorded events, pointing to a climate-fueled trend that’s only accelerating.

Millions on the Edge

Over 2 million Indians live downstream from these lakes. Entire towns, power stations, and pilgrimage trails lie in the path of potential disaster.

Melting Himalayas

Glaciers here are melting ten times faster than ever before. As they retreat, they leave behind unstable lakes—growing in silence, ready to unleash chaos.

Tsunami from the Ice

When a glacial lake bursts, it doesn’t trickle—it detonates. Massive waves of water and rock crash downhill like an alpine tsunami, leveling everything in their path.

Lasting Scars

These floods don’t just kill—they ruin. Crops vanish, roads wash out, power grids fail, and ecosystems collapse, leaving long-term trauma in mountain communities.

Racing the Collapse

India and its allies are scrambling to install early warning systems and drain risky lakes. But the terrain is brutal, the clock is ticking, and prevention is still far behind the pace of the threat.