Published: Sep 29, 2026, 19:20 IST | Updated: Sep 29, 2026, 19:20 IST
High up in Pakistan's mountains, glaciers are melting and the lakes they feed are getting bigger. If one of those lakes breaks through its natural wall of ice and rock, the water can rush down the valley with almost no warning. That's what experts call a glacial lake outburst flood, or GLOF.