Mountain glaciers on all continents are observed to be receding in response to global warming (McDowell, 2002).
In Bhutan in the Himalayan mountains melting glaciers are retreating up the mountains at a rate of 30-40 m
per year in response to temperature measurements (from nearby Nepal) that show a 1oC warming since the 1970s.
These melting glaciers are creating unstable lakes of melt water that threaten
to burst their banks. Forty-four lakes in Nepal and Bhutan are at risk to bursting natural dams within the
next 5-10 years.
Reference
McDowell, M, 2002: Melting ice triggers Himalayan flood warning. Nature, 416, 776.