A volcano near the Philippine capital spewed lava, ash and steam and trembled constantly Tuesday on the third day of an eruption that could portend a much bigger and dangerous eruption, officials warned as tens of thousands of people fled ash-blanketed villages in the danger zone.

Red-hot lava gushed out of a Philippine volcano Monday after a sudden eruption of ash and steam that forced villagers to flee en masse and shut down Manila's international airport, offices and schools.