The Taal Volcano in the Philippines continues to belch out smoke as authorities warned residents of hazardous volcanic smog today.

Footage shows faint plumes of steam-rich vapour rising from the volcano in Batangas province at 8 am on June 7.

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) said in a bulletin today that the voluminous gas columns reached around 2,000 metres tall. The agency warned of possible steam-driven eruptions, minor ashfall, volcanic earthquakes, and lethal accumulation of gases.

Flights have been prohibited from operating 10,000 feet from the volcano's summit due to the threat of phreatic eruptions, the Civil Aviation Authority of the Philippines said.

Pregnant women, children, and the elderly, especially those with underlying health conditions, were also advised to stay indoors as the fumes were hazardous to their health.

Alert Level 1 is still hoisted over the volcano on June 7.

In a statement, PHIVOLCS said: 'DOST-PHIVOLCS reminds the public that Alert Level 1 prevails over Taal Volcano, which means that it is still in abnormal condition and should not be interpreted to have ceased unrest nor ceased the threat of eruptive activity.

'DOST-PHIVOLCS is closely monitoring Taal Volcano's activity and any new significant development will be immediately communicated to all stakeholders.'

According to PHIVOLCS, Alert Level 1 indicates 'low level of volcanic unrest'. It warned there may be steam-driven or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas.