Toxic Gas Alert For Hawaii Volcano Eruption; New Areas At Risk

Residents on the Big Island of Hawaii were alerted on Thursday to rising levels of toxic gas from lava-oozing fissures, and geologists warned that new areas east of the erupting Kilauea volcano may be at risk of molten rock bursting from the ground.

Slide 1 of 110: A woman collects donated respirator masks for herself and a child in the aftermath of the Kilauea volcano eruption on Hawaii's Big Island on May 10, 2018 in Pahoa, Hawaii. The community has been hit hard by lava flows and volcanic gases released from fissures. Vog, a haze or smog containing gases, smoke and dust from volcanic eruptions, may eventually spread to other islands in Hawaii. (Photo by Mario Tama/Getty Images)

Hawaii County authorities sent a text message to residents of the southeast corner of the island warning them of a wind change that would bring rising levels of sulfur dioxide gas, which can be fatal if inhaled in large quantities.

"It’s just horrible. You can’t breathe in there," said evacuated resident Robynn Stagg, 58, who drove through the thick, orange sulfur dioxide haze earlier this week in a failed attempt to check on her home.

Hawaii's governor has warned that mass evacuations may be required as more fissures open in the ground and spew lava and gas into semi-rural residential areas on the east flank of Kilauea, one of the world's most active volcanoes.

During an evening meeting with community members, an official with the United States Geological Survey's Hawaii Volcano Observatory said that while no new fissures have opened during the last 24 hours, there has been "quite a bit" of ground cracking over the last day and that they were releasing steam.

"Because the lava intrusion is still active and earthquakes are still occurring, we still think there’s a decent chance of new eruptive activity at the surface," Steven Brantley said.

Authorities on Thursday completed the removal of highly flammable chemicals from a nearby geothermal power plant that was in the path of creeping lava.

The latest upheaval at Kilauea began last week after the crater floor of a long-active side vent collapsed suddenly in a cloud of ash, triggering a similar plunge in the molten lake inside the larger crater at the volcano's summit.

What followed was a flurry of earthquakes as huge volumes of magma -- the term for lava beneath the surface -- drained back through deep-underground passages that carried the molten rock far downslope. The lava then forced its way back to the surface through large cracks, or fissures, that opened at ground level in a residential area miles (km) away.