Recent eruptions from the La Palma volcano have sent rivers of lava to the sea, raising fears of toxic gases.
Two new vents have been opened into Earth by the Cumbre Vieja volcano, prompting thousands of residents to stay indoors as air quality deteriorates.
The lava that erupted 10 days earlier formed a pyramid-shaped form more than 150 feet high in the ocean and produced intense clouds of black and white smoke.
“The new lockdown is a result of meteorological conditions that prevent the dispersion of gases and keep them at low levels of the atmosphere,” emergency services said in a statement.
He said around 3,500 people would be affected by the lockdown.
Miguel ngel Morcuende, director of the Pevolca response committee, said the volcano was experiencing “intense activity”.
When lava comes into contact with the ocean, it generates a gas plume known as a lava – lava and haze – through a series of chemical reactions as it boils off cold ocean water.
Laziness can cause eye, lung and skin irritation but should not be a problem if residents keep their distance.
“It vaporizes hydrochloric acid, water vapor and pieces of ash,” volcanologist Dr Robin George Andrews told the BBC.
“Obviously, it’s not good to breathe.”
Scientists recorded eight new small earthquakes at the site overnight as the night sky lit up with flames from the volcano in dramatic images.
About 6,000 people have been evacuated from their homes since the Cambre Vieja volcano erupted on 19 September.
More than 800 buildings have been destroyed on this island with a population of about 83,000.
The devastation is huge as lava scorched a massive pool towards the sea, affecting the island’s banana industry and causing 400 million euros in damage.
No deaths or serious injuries have been reported from the island’s first eruption in 50 years, thanks to the quick evacuation of Earth in the first hours after the eruption.
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