Global Warming Could Decimate the Himalayan Mountains Within a Century A new assessment says over two-thirds of the Himalaya's glaciers could br melt by 2100. Even if steps are made towards reducing global warming, br one-third of the Himalayas will still be affected. The report adds that by 2100, the region's temperature will increase br 8 degrees Fahrenheit at the br current rate. The study's authors say melting will have dire consequences for people who get their food and water from br around the area. The potentially affected Himalayan areas supply water to at least 25 of the world's population.