Lava flows from an eruption of a volcano near El Paso on the island of La Palma in the Canaries, Spain on Sept 19, 2021. (EUROPA PRESS VIA AP)

LA PALMA, Spain - Authorities have evacuated about 5,000 people from villages in the Spanish Canary Island of La Palma as lava spews from an erupting volcano, local officials said.

The 15-meter high lava flow has already swallowed 20 houses in the village of El Paso and sections of roads, Mayor Sergio Rodriguez told TVE radio station on Monday morning.

Since erupting on Sunday afternoon, the volcano has shot lava up hundreds meters into the air and poured flows of molten rock towards the Atlantic Ocean over a sparsely populated area of La Palma, the most northwestern island in the Canaries archipelago

It is now spreading through the neighbouring village of Los Llanos de Aridane where hundreds of houses are at risk, he said.

"We are monitoring the trajectory of the lava," Rodriguez said.

Since erupting on Sunday afternoon, the volcano has shot lava up hundreds meters into the air and poured flows of molten rock towards the Atlantic Ocean over a sparsely populated area of La Palma, the most northwestern island in the Canaries archipelago.

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Local authorities have evacuated about 5,000 people from four villages, including El Paso and Los Llanos de Aridane, and no further evacuation are likely to be necessary, Canary Islands regional president Angel Victor Torres said on Monday morning.

"The lava is moving towards the coast and the damage will be material. According to experts there are about 17-20 million cubic meters of lava," he said.

This AFP graphic dated Sept 19, 2021 shows the map locating a volcanic eruption on the Canary Island of La Palma on Sept 19, 2021.

No fatalities were reported and none are likely to happen so long as no one behaves recklessly, vulcanologist Nemesio Perez said on Monday.

La Palma had been on high alert after more than 22,000 tremors were reported in the space of a week in Cumbre Vieja, which belongs to a chain of volcanoes that last had a major eruption in 1971 and is one of the most active volcanic regions in the Canaries.

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In 1971, one man was killed as he was taking photographs near the lava flows, but no property was damaged.

Prime Minister Pedro Sanchez arrived in La Palma on Sunday night for talks with the islands' government on managing the eruption.

"We have all the resources and all the troops, citizens can rest easy," he said.