At least 18 people have been confirmed dead, and as many as 200 are missing after a Himalayan glacier collapsed and triggered a massive flood in the northern Indian state of Uttarakhand. It’s thought that most of the missing are workers from 2 hydropower plants in the valley. Troops are digging through the debris, but the focus is on saving 37 workers stuck inside a tunnel at one of the plants. The extreme water volume that was unleashed has destroyed at least one plant and has damaged a chain of others located along the river. While the disaster’s exact cause is still unconfirmed, experts said it could be linked to climate change. Video footage of the water coming down the valley is terrifying…