Residents of Guinobatan, Albay are experiencing "early nightfall" on Monday as Mayon Volcano continues to spew ash.
Governor Al Francis Bichara posted photos of the scenario on Facebook, reminding residents to stay indoors and wear face masks.
"Almost evening already at Guinobatan, Albay brought about by the Mayon Volcano eruption. Everyone is advised to stay indoors and wear face masks or to prepare wet towels in lieu of face masks," Bichara wrote in the caption.
The photos, posted around 4 p.m., showed dark skies in Guinobatan, one of the towns affected by volcanic ash.
Phivolcs on Monday raised the volcano's alert level to level 4, one notch below the highest warning. This indicates a hazardous eruption is "imminent" and that the danger zone has been extended to an 8 kilometers radius.
"The public is strongly advised to be vigilant and desist from entering this danger zone. Civil aviation authorities must also advise pilots to avoid flying close to the volcano's summit as ash from eruptions can be hazardous to aircraft," Phivolcs said.