An ominous glow from the Philippines’ most active volcano has prompted the evacuation of more than 12,000 people from its surrounding areas. There have been a series of quakes and rockfalls at Mount Mayon in the country’s Bicol region, sparking fears of a possible eruption, Reuters reports. “We are now raising the alert status of Mayon Volcano from alert level 2 to 3,” said Renato Solidum, head of the Philippine Institute of Volcanology and Seismology, on Tuesday. Joey Salceda, governor of the Albay province where the mountain is located, said the evacuees would be housed in temporary shelters for up to three months.