TAGAYTAY, Philippines — A volcano near the Philippine capital spewed lava into the sky and trembled constantly Tuesday, possibly portending a bigger and more dangerous eruption, as tens of thousands of people fled villages darkened and blanketed by heavy ash.
Government work was suspended and schools were closed in a number of towns and cities, including Manila, because of health risks from the ash. Hundreds of flights were canceled or delayed, affecting tens of thousands of passengers.
The restiveness of the Taal volcano and several new fissures in the ground nearby likely mean magma is rising and may lead to further eruptive activity, the Philippine Institute of Volcanology and Seismology said.
The volcano was spurting fountains of red-hot lava half a mile into the sky, and the massive column of ash and volcanic debris at times lit up with streaks of lightning.
The alert level since the eruption began Sunday has been 4, indicating a hazardous eruption is possible in hours to days. Level 5, the highest, means such an eruption is underway.
More than 350 volcanic earthquakes have been recorded near Taal since Sunday, U.N. spokesman Stephane Dujarric said in New York.
The Philippine institute said about 50 volcanic earthquakes were detected over eight hours Tuesday, indicating rising magma. It also warned that heavy and prolonged ash fall was possible in nearby villages.
“The speed in the rise of magma is important [in determining] when the volcano will have a strong eruption and if it will slow down and freeze,” said Renato Solidum, who heads the institute. “As of now, we don’t see activities slowing down and the earthquakes still continue.”
More than 38,000 people have been moved so far to over 200 evacuation centers, Dujarric said. He said U.N. teams are visiting centers and supporting authorities, who have asked for help getting face masks.
The picturesque volcano in the middle of a lake in Batangas province south of Manila rumbled to life Sunday in a powerful explosion that blasted a nine-mile column of ash, steam and rock into the sky. Clouds of volcanic ash blowing over Manila, 40 miles to the north, closed the country’s main airport Sunday and part of Monday until the ash fall eased.
More than 500 international and domestic flights were canceled or delayed due to the overnight airport closure, affecting about 80,000 passengers, airport manager Ed Monreal told the Associated Press.
“Hopefully the wind direction does not change. As long as the ash fall does not reach us, then we can be back to normalcy,” Monreal said.
The disaster-response agency counted more than 40,000 evacuees in Batangas and nearby Cavite provinces who took shelter in nearly 200 evacuation centers. Officials expected the number to swell.
Solidum warned residents from returning to high-risk villages based on perceptions that the eruption was easing. He warned of pyroclastic flows, super-heated material from the volcano that can travel at great speed and incinerate anything in their path.
Solidum said it would take time for Taal’s restiveness to ease and the lives of affected villagers to return to normal but added it’s difficult to predict the volcano’s behavior with certainty.
“We have to make sure that people understand and, of course, government, that this is not an activity that will just be a short while,” Solidum told a news conference.
President Rodrigo Duterte visited hard-hit Batangas, which has been declared a calamity zone for faster disbursement of emergency funds. Accompanied by top disaster-response officials and Cabinet members, he promised the government would help with the cleanup and reconstruction.