The latest developments in Pakistan’s mountainous regions offer a worrying indication of the growing risks associated with a changing climate. According to Suparco, the number of unfrozen glacial lakes it observed increased from 40 in early July to 105 in August. Some of these lakes were also larger than previously recorded. While the presence or expansion of a glacial lake does not automatically mean that a disaster is imminent, unusually large or rapidly expanding lakes can create additional pressure on the natural barriers holding back their waters, potentially increasing the risk of a glacial lake outburst flood.
Such floods can be sudden and destructive. When a natural dam of ice, rock or debris fails, large volumes of water can rush downstream, threatening settlements, roads, bridges, agricultural land and other infrastructure. For a country with thousands of glaciers and communities living in vulnerable mountain valleys, early identification of such threats is therefore essential.
Satellite monitoring has become an invaluable tool in this effort. It allows scientists and authorities to observe remote and difficult-to-access mountain regions and track changes in glacial lakes over time. However, satellite imagery alone cannot provide a complete assessment of the danger. Determining how threatening a particular lake may be requires information about its depth, the stability of the natural barrier containing it, the condition of surrounding glaciers and prevailing weather conditions.
Hanging glaciers present another serious challenge. A sudden collapse of ice or debris into a glacial lake could displace large quantities of water and potentially trigger a destructive flood. Such risks may not always be fully understood through satellite imagery alone. Cloud cover can further limit observations, as Suparco has acknowledged, making ground-based assessments an important complement to remote sensing.
Pakistan must therefore move beyond simply counting and mapping glacial lakes. The priority should be to determine which lakes pose the greatest risk, what factors make them dangerous and which communities or infrastructure could be affected if they were to burst. This requires combining information gathered from space with detailed observations conducted on the ground.
When satellite imagery indicates that a lake is expanding rapidly, it should trigger closer field investigations. Suparco, Wapda, universities, meteorological experts and provincial disaster management authorities should work together to assess such sites and share their findings. A coordinated system could identify lakes where water levels are rising, natural barriers may be weakening, or nearby glaciers are showing signs of instability.
Better coordination is particularly important because Pakistan’s agencies often possess different pieces of information. Scientific institutions may have satellite imagery and glacier data, meteorological authorities may have information about temperature and precipitation, while provincial disaster agencies may know which communities and infrastructure are located downstream. Bringing these datasets together would provide a much clearer picture of the risks facing vulnerable valleys.
Pakistan has more than 13,000 glaciers, making it impossible to monitor every glacier and glacial lake with the same intensity. Resources should instead be directed towards areas where the potential consequences are greatest. Satellite monitoring can play a crucial role in identifying rapidly changing lakes and helping scientists decide where detailed field investigations are most urgently required.
The increase from 40 to 105 unfrozen glacial lakes should therefore be treated as more than another statistic illustrating the effects of climate change. It is also a test of Pakistan’s capacity to convert early warnings and scientific observations into practical disaster-prevention measures. Monitoring is useful only when the information gathered leads to timely action.
Pakistan cannot prevent every glacial change, but it can improve its ability to anticipate the consequences. By combining satellite technology, field research, weather information, scientific expertise and local disaster preparedness, authorities can identify the most dangerous lakes and take steps before an outburst becomes a catastrophe. The real challenge is not merely seeing what is changing in the mountains, but understanding what those changes mean — and acting before it is too late.
Shafaqna Pakistan
pakistan.shafaqna.com
Note: Shafaqna do not endorse the views expressed in the article
