Hawaii faced a new threat on Sunday as lava flows from Kilauea’s volcanic eruption could cause the emission of clouds of acid fumes, steam and glass-like particles as they reach the Pacific, authorities said. Civil defence notices warned motorists, boaters and beachgoers to beware of caustic plumes of “laze” formed from two streams of hot lava pouring into the sea after cutting across Highway 137 on the south coast of Hawaii’s Big Island late on Saturday and early Sunday.
The bulletins also warned that reports of toxic sulfur dioxide gas being vented from various points around the volcano had tripled, urging residents to “take action necessary to limit further exposure.” Laze – a term combining the words “lava” and haze” – is a mix of hydrochloric acid fumes, steam and fine volcanic glass specks created when erupting lava, which can reach 2,000 degrees Fahrenheit (1,093 degrees Celsius), reacts with seawater, Hawaii County Civil Defense said in a statement.
“Be aware of the laze hazard and stay away from any ocean plume,” the agency said, warning that potential hazards include lung damage, as well as eye and skin irritation.
Under Sunday’s conditions, with strong winds and copious amounts of lava hitting the ocean, the laze plumes could extend as far as 15 miles (24 km), mostly along the coast and offshore, though the hazard would diminish the farther out to sea it blows, according to USGS geologist Janet Babb.
Authorities warned, however, that wind patterns can alter abruptly. The US Coast Guard was “actively monitoring” the area to keep away all vessel traffic except permitted tour boats, the civil defence office said.
Laze killed two people when a lava flow reached the coast in 2000, and even a wisp can cause eye and respiratory irritation, the US Geological Survey said. Acid rain from laze has corrosive properties equivalent to diluted battery acid, the agency said.
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The section of coastal Highway 137 and a nearby a state park in the area where lava was pouring into the ocean were both closed, and another road in the vicinity was restricted to local traffic as a precaution due to elevated levels of sulfur dioxide gas.
An air quality index for Kona, about 40 miles (64 km) northwest of the eruption site, was at “orange” level, meaning that older individuals and those with lung problems could be affected.
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