Lava erupts from a fissure in Kapoho, Hawaii Monday, May 21, 2018. The eruption of Kilauea volcano in Hawaii sparked new safety warnings about toxic gas on the Big Island's southern coastline after lava began flowing into the ocean and setting off a chemical reaction. (AP Photo/Jae C. Hong)

Lava erupts from a fissure in Kapoho, Hawaii Monday, May 21, 2018. The eruption of Kilauea volcano in Hawaii sparked new safety warnings about toxic gas on the Big Island's southern coastline after lava began flowing into the ocean and setting off a chemical reaction. (AP Photo/Jae C. Hong)

A resident takes photos as fissures spew lava in the Leilani Estates subdivision near Pahoa, Hawaii, Tuesday, May 22, 2018. Authorities were racing Tuesday to close off production wells at a geothermal plant threatened by a lava flow from Kilauea volcano on Hawaii's Big Island. (AP Photo/Jae C. Hong)