LEGAZPI CITY: The Philippine Institute of Volcanology and Seismology (Phivolcs) on Saturday warned disaster officials and the public to brace for lahar flow from Mayon Volcano following heavy rainfall brought by the tail end of the cold front.

Ed Laguerta, Phivolcs resident chief volcanologist, said all river channels connected to Mayon gullies were more dangerous than ashfall and could become conduits for lahar flow in low-lying areas of Albay province.