In this Saturday, May 5, 2018, photo provided by the U.S. Geological Survey, lava from Fissure 7 slowly advances to the northeast on Hookapu Street in the Leilani Estates subdivision in Pahoa, Hawaii. The Kilauea volcano sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, and authorities detected high levels of sulfur gas that could threaten the elderly and people with breathing problems. (U.S. Geological Survey via AP)