Phivolcs Urges Caution as Kanlaon Volcano Faces Increased Lahar Risk from Rainfall

The Philippine Institute of Volcanology and Seismology (Phivolcs) has reiterated its warning regarding the potential for lahars around Kanlaon Volcano following forecasts of heavy rainfall. The agency's caution comes as the region anticipates weather that could trigger these dangerous flows of volcanic mud and debris. In a statement issued on Sunday, December 15, Phivolcs urged the public to steer clear of rivers, waterways, and areas that lie downstream of the volcano. Residents have been advised to heed evacuation orders issued by local authorities to prioritize safety. "Evacuate as advised by authorities. Let's all be safe," the agency emphasized, highlighting the necessity of precautionary measures in light of the current conditions. Kanlaon Volcano, one of the most active in the Philippines, poses a dual threat, especially during heavy rains. Lahars, which are a mixture of volcanic ash, rocks, and water, can surge down river channels with great speed, resembling a thick slurry akin to wet concrete. The danger is not merely from the initial flow; as these lahars travel, they can erode the landscape, picking up additional debris like soil, rocks, and even structures, thereby amplifying their destructive potential. Phivolcs has described lahar as a secondary volcanic hazard, which can occur both during volcanic eruptions and in the aftermath. The agency reminded communities and local government units to be vigilant about weather conditions and to stay informed about rainfall warnings. The agency's monitoring from December 14 to 15 has already detected 14 volcanic earthquakes and noted continuous moderate degassing of sulfur dioxide from the volcano, indicators of ongoing volcanic activity that could further complicate the situation. The impacts of lahar flows are significant, often resulting in the erosion and washout of river channels, burial of areas under mud, and flooding of impacted zones. As the situation develops, local authorities are expected to remain on high alert and implement necessary measures to safeguard communities, ensuring that those living in the vicinity are aware of the risks and prepared for potential evacuations. With the monsoon season and unpredictable weather patterns affecting the region, Phivolcs' warnings serve as a critical reminder of the dynamic and potentially hazardous nature of living near active volcanoes. Residents are encouraged to stay informed and prioritize safety as they navigate this precarious period.