HAWAII VOLCANOES NATIONAL PARK, HI - MAY 15: People play golf as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Hawaii Volcanoes National Park, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
HAWAII VOLCANOES NATIONAL PARK, HI - MAY 15: A man drives a golf cart at a golf course as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Hawaii Volcanoes National Park, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater Òhas raised the potential for explosive eruptionsÓ at the volcano. (Photo by Mario Tama/Getty Images)
VOLCANO, HI - MAY 15: An ash plume rises from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Volcano, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
HAWAII VOLCANOES NATIONAL PARK, HI - MAY 15: A woman hold her dog Tzippy at a golf course as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Hawaii Volcanoes National Park, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
VOLCANO, HI - MAY 15: People take photos as an ash plume rises from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Volcano, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
VOLCANO, HI - MAY 15: A woman takes a photo as an ash plume rises from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Volcano, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
HAWAII VOLCANOES NATIONAL PARK, HI - MAY 15: A family gathers at a golf course as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Hawaii Volcanoes National Park, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
HAWAII VOLCANOES NATIONAL PARK, HI - MAY 15: People watch at a golf course as an ash plume rises in the distance from the Kilauea volcano on Hawaii's Big Island on May 15, 2018 in Hawaii Volcanoes National Park, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater 'has raised the potential for explosive eruptions' at the volcano. (Photo by Mario Tama/Getty Images)
PAHOA, HI - MAY 14: The latest Kilauea volcano activity illuminates the sky and is reflected off a vehicle (Bottom) on Hawaii's Big Island on May 14, 2018 in Pahoa, Hawaii. The U.S. Geological Survey said a recent lowering of the lava lake at the volcano's Halemaumau crater "has raised the potential for explosive eruptions" at the volcano. (Photo by Mario Tama/Getty Images)