The flooding caused by the blockage covered the Karakoram Highway. Six thousand people had to move from upstream villages. Another 25,000 people had to stay where they were because roads were blocked. It inundated over 19 km of the Karakoram Highway.
By the first week of June 2010, the new lake was 21 km long and over 330 feet deep. At that time, it flowed over the landslide dam, completely submerging lower Shishkat and partly flooding Gulmit. The subdivision of Gojal has the greatest number of flooded buildings, over 170 houses and 120 shops. The residents also had shortages of food and other items due to the blockage of the Karakoram Highway. By June 4 water outflow from the lake had increased to 3700 cu ft/sec