Residents of Camalig, Daraga, and Guinobatan in Albay province woke in June 2026 to skies so black with volcanic ash that streetlights stayed on past dawn. A pyroclastic flow had torn roughly 4 kilometers down Mayon volcano’s southeastern flank, sending superheated gas and pulverized rock racing through the Mi-isi gully and blanketing roads, rooftops, and farmland in thick gray debris. Drivers pulled over because they could not see the pavement. Schools closed. And more than 5,400 people grabbed what they could carry and left their homes.
“We could not see anything. It was like nighttime at eight in the morning,” said a barangay captain in Camalig who asked to be identified only by his first name, Rodel, as he coordinated evacuees at a local school gymnasium serving as a temporary shelter. Municipal disaster officer Liza Mendoza of Guinobatan told reporters that her team had been going door to door since before dawn: “We are telling everyone within the extended danger zone to leave now and not wait for a second flow.”
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) said the flow was triggered by the collapse of lava deposits that had been accumulating on Mayon’s upper slopes since the current eruption phase began on January 6, when the agency raised the alert level. As of June 2026, PHIVOLCS has maintained Alert Level 3, meaning the volcano is in a “relatively high level of unrest” with magma at the crater and hazardous eruptions possible. According to PHIVOLCS Director Teresito Bacolcol, the cumulative volume of erupted material, including rockfalls, lava flows, and pyroclastic density currents across several drainage systems, now exceeds 22 million cubic meters.
How far the flows reached
Satellite imagery analyzed by NASA’s Earth Observatory confirmed that the longest single pyroclastic flow traveled about 4 km through the Mi-isi drainage. PHIVOLCS separately reported that lava reached nearly 4 kilometers from the crater and that pyroclastic density currents hit similar distances in the Mi-isi, Bonga, and Basud channels.
The Smithsonian Institution’s Global Volcanism Program, which cross-references PHIVOLCS bulletins with its own curated chronology, has recorded pyroclastic density currents that may have extended approximately 4.2 to 4.6 km in specific drainages, though the program’s compiled reports do not always distinguish between directly measured and modeled distances. The discrepancy with the 4 km figure cited by Philippine authorities and NASA likely reflects differences in measurement methodology, the specific channel being tracked, or the timing of observation. But even a few hundred extra meters of flow reach can place new communities inside the hazard zone.
That gap matters because Mayon’s Permanent Danger Zone, the area where entry and habitation are prohibited, has a fixed radius around the summit. Pyroclastic density currents are among the deadliest volcanic hazards: they can exceed 100 km/h and carry temperatures high enough to ignite structures on contact. With the longest flows already stretching 4 to 4.6 km from the crater, any uptick in eruption intensity could push material beyond the established buffer and into settlements that have not yet been ordered to evacuate.
124 villages under ash
Philippine officials told reporters that nearly 200,000 people in 124 barangays (villages) were affected by the ashfall, according to the Philippine Information Agency. The more than 5,400 who evacuated, a figure attributed to the Albay Provincial Disaster Risk Reduction and Management Office, represent those who left voluntarily or under local government orders; the actual number of displaced people may be higher as assessments continue.
At the Guinobatan Central School evacuation center, relief coordinator Maricel Santos of the local social welfare office said supplies were arriving but not fast enough. “We have rice and water for maybe two days. After that we need help from the province and the national government,” she said.
No official casualty count or injury report has been released by PHIVOLCS or the National Disaster Risk Reduction and Management Council. That may mean there were no direct fatalities from the latest flow, or it may mean the data has not yet been compiled. In disaster coverage, early population figures are best treated as minimums that tend to rise as field teams reach more remote areas.
The thickness and chemical composition of the ash blanketing those 124 villages have not been quantified in any public PHIVOLCS bulletin, leaving residents and local officials without clear guidance on respiratory risk or the structural load on rooftops. Albay province is a major coconut and rice producer, and heavy ashfall can destroy standing crops, contaminate water sources, and render farmland unusable for months. No Philippine government agency has yet published an estimate of agricultural losses tied to this eruption phase.
What volcanologists are watching next
Under Alert Level 3, PHIVOLCS has warned that hazards at Mayon are rising but has not publicly characterized the eruption’s trajectory in probabilistic terms. A further escalation to Alert Level 4 would indicate that a hazardous explosive eruption is imminent, and Alert Level 5 would mean one is already underway. There are no seismic precursor analyses in the public record suggesting whether the volcano is building toward a larger explosive eruption or settling into a prolonged effusive phase. Without that assessment, the question of whether the current activity is a prelude to something bigger or a peak in a slowly waning cycle remains open.
The 22 million cubic meters of accumulated material is a large number, but limited public information makes it difficult to compare with previous Mayon eruptions. The volcano has produced deadly pyroclastic flows before, most notably in 1814, when an eruption buried the town of Cagsawa and killed more than 1,200 people, and in 1993, when pyroclastic surges killed 77 farmers working inside the danger zone. Historical context like this is what residents weigh, consciously or not, every time the mountain rumbles.
For now, the most pressing needs are updated hazard maps that reflect the current flow distances, clear communication about which drainage channels pose the greatest threat, and specific guidance on what signals, such as intensified seismic tremor or a spike in sulfur dioxide emissions, would trigger a broader mandatory evacuation. Local governments must also decide whether the temporary shelters housing evacuees need to be converted into longer-term relocation sites.
Why the margin of safety on Mayon’s slopes keeps shrinking
Mayon is the most active volcano in the Philippines, with more than 50 recorded eruptions since 1616. The same slopes that draw farmers with fertile soil and reliable water lie squarely in the path of lava, ash, and pyroclastic flows. That tension between productive land and lethal risk defines life in Albay and is unlikely to be resolved by any single eruption.
What this episode has already made clear is that the margin of safety is thinner than many residents assumed. When a pyroclastic flow can race 4 kilometers downhill in minutes and turn midday into midnight across 124 villages, the decisions facing Albay’s communities are not only about surviving the current phase. They are about how, and where, to rebuild in a landscape that can change in a single night.
More from Morning Overview
*This article was researched with the help of AI, with human editors creating the final content.
