Ashfall Hits Cebu After Mt. Kanlaon Eruption
Volcanic ash from Mt. Kanlaon reached Cebu on July 9, 2026, following a moderate eruption of the stratovolcano straddling Negros Occidental and Negros Oriental. The ashfall was visible on windshields in Toledo City, southwestern Cebu, prompting authorities to advise residents to wear masks and limit exposure.
The eruption occurred past 7:30 a.m., sending ash into the air that later drifted across the Tañon Strait. The Philippine Institute of Volcanology and Seismology (Phivolcs) and the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) tracked the ash movement. Pagasa observed haze around 11 a.m., about two hours after wind data showed ash moving toward Cebu.
Wind Patterns and Ash Trajectory
Pagasa Visayas Chief Alfredo Quiblat Jr. stated that the ashfall may clear by Friday, July 10, if no further eruptions occur. He attributed the ash movement to moderate to strong southwest winds influenced by Typhoon Inday and the southwest monsoon (habagat).
Phivolcs Volcano Monitoring and Eruption Prediction Division Head Mariton Antonia Bornas clarified that weather conditions do not cause eruptions but determine where ash and other volcanic materials travel. At eruption time, the Philippines was affected by Typhoon Inday and the habagat, which pushed ash toward Cebu.
Air Quality and Health Risks
The Environmental Management Bureau (EMB) 7 detected increased PM10 levels in Cebu due to ashfall, according to Air Quality Monitoring Expert Arthur Niño Calupig. PM10 refers to airborne particles 10 microns and smaller, which can be inhaled and pose health risks.
Department of Health Central Visayas (DOH 7) Director Joshua Brillantes warned that ashfall may cause respiratory problems, skin irritation, eye irritation, and other health concerns. He advised residents to avoid unnecessary outdoor activities, as fine ash particles can still be inhaled, especially if masks do not fit properly.
Brillantes emphasized that children, infants, people with asthma, chronic lung disease, cancer patients, and those with comorbidities face higher risks of complications and secondary infections. He also noted that ashfall can cause mental and emotional stress, particularly for residents unable to leave their homes due to illness or other limitations.
Water Safety and Ash Cleanup
EMB 7 warned residents not to drink groundwater or other water sources exposed to ashfall. Calupig stated that removing visible ash particles may not make water safe, as volcanic ash can contain sulfur and other minerals that contaminate sources and cause health issues. “Once our groundwater sources used for drinking are mixed with ash, they are really not advisable to consume,” he said.
Phivolcs advised against hosing down heavy ashfall. Bornas recommended sweeping and collecting ash properly to avoid clogging drainage systems. Collected ash may be stored for potential reuse in construction materials or agricultural soil due to its mineral content.
Ongoing Monitoring and Precautions
Officials urged residents to continue monitoring advisories, limit ash exposure, and keep drinking water sources covered. Similar ashfall may recur if Mt. Kanlaon remains active and winds again carry ash toward Cebu. Residents were advised to use properly fitted N95 or KN95 masks when outdoors and to stay indoors when possible.
