---
title: "At Least 20 Killed in Blast at Hydroelectric Project in India's Sikkim"
description: "At least 20 workers have died in an explosion at a hydroelectric project in the Indian state of Sikkim, blamed on a sudden release of methane gas during tunneling. Rescuers, hampered by flooding and monsoon rains, say they hold little hope of finding survivors."
category: "World"
category_url: https://newsparlor.com/category/world
author: "Megan Chen"
published: 2026-07-22T19:33:24.000Z
updated: 2026-07-22T19:33:24.000Z
canonical: https://newsparlor.com/article/at-least-20-killed-in-blast-at-hydroelectric-project-in-india-s-sikkim
tags: ["india", "sikkim", "disaster", "hydropower", "himalayas"]
---
# At Least 20 Killed in Blast at Hydroelectric Project in India's Sikkim

At least 20 workers have died in an explosion at a hydroelectric project in the Indian state of Sikkim, blamed on a sudden release of methane gas during tunneling. Rescuers, hampered by flooding and monsoon rains, say they hold little hope of finding survivors.

At least 20 people have been killed in an explosion at a hydroelectric project in Sikkim, in northeastern India, [Al Jazeera reports](https://www.aljazeera.com/news/2026/7/22/death-toll-from-blast-at-indian-hydroelectric-project-rises-to-20-people). Those who died were workers at the construction site.

## What happened

The disaster struck a 500-megawatt project run by the state-owned National Hydroelectric Power Corporation (NHPC).

According to Al Jazeera, 25 people were trapped by the blast. Thirteen bodies had been recovered, with a further seven or eight spotted but not yet retrieved, bringing the confirmed toll to at least 20. NHPC attributed the explosion to an "explosive release of suspected methane gas" that had been trapped in the rock, which generated dense smoke and toxic gases in the tunnel where the workers were.

That cause is worth explaining. Methane can accumulate naturally in rock, and tunneling can release it suddenly; in a confined space, it can ignite or displace breathable air. It is a known hazard of underground construction, which is part of why the deaths raise questions about the conditions the workers were operating in.

## The rescue

The effort to reach the missing has been severely hampered, and officials are not optimistic.

Al Jazeera reports that waterlogging in the tunnel, continuing methane leakage and torrential monsoon rains have all obstructed the recovery. A director at the Sikkim State Disaster Management Authority, Rajiv Roka, was somber about the prospects. "Looking at the condition, I don't think there could be any survivors," he said, and described the practical difficulty: "There was a collection of water … so it's been difficult to retrieve the bodies."

We are reporting the toll as confirmed dead and bodies sighted; the final number may rise as the remaining workers are accounted for.

## The wider context

This disaster fits a pattern that experts have been warning about in the Himalayan region.

Al Jazeera reports that environmental specialists link the rising frequency of such disasters to rapid infrastructure development in an ecologically fragile, seismically active area, where unstable rock formations make tunneling especially hazardous. The Himalayas are steep, young mountains, prone to earthquakes, landslides and flooding, and the same rivers that make them attractive for hydropower run through terrain that is difficult and dangerous to build in.

That tension, between a genuine need for energy and the risks of large construction projects in fragile mountains, is the backdrop to this loss. The immediate story is 20 workers killed underground; the longer one, which India and other Himalayan nations face repeatedly, is how much risk major infrastructure should carry in a landscape this unforgiving.

## Sources

- [Death toll from blast at Indian hydroelectric project rises to 20 people](https://www.aljazeera.com/news/2026/7/22/death-toll-from-blast-at-indian-hydroelectric-project-rises-to-20-people)