The civil defence agency had ordered more residents of the vulnerable Leilani Estates area to leave because of the lava.
Only one person has been seriously injured so far, when a man's leg was shattered when it was hit by a flying molten rock.
There are at least three active fissures, or cracks, with lava flowing out of them.
Operator Ormat Technologies Inc last week said there was no above-ground damage to the plant but it would have to wait until the situation stabilised to assess the impact of earthquakes and lava flows.
Klopp laments Salah injury blow
The youngster, who has improved dramatically across the season, admitted to costing his team a chance at winning. He will stay in Liverpool and will have there the rehab period then will join the Egyptian team camp in Italy.
The Hawaiian Volcano Observatory says the Halemaumau crater is producing small bursts of volcanic ash.
The destruction came after rivers of lava flowed toward the ocean over the weekend, forcing officials to knock on doors and urge residents holding out in two evacuated neighbourhoods to flee right away.
The comment was among a flood of public service announcements Wednesday about the Kilauea volcano in Hawaii, which has been in eruption since May 3 on the Big Island.
But lava has never engulfed a geothermal plant anywhere in the world and the potential threat is untested, according to the head of the state's emergency management agency.
Ten more homes in the path of Hawaii's Kileaua volcano eruption have been destroyed overnight by fast-moving lava, a spokesperson for the Hawaii County Civil Defense told ABC News.
In addition, two of the wells at the geothermal plant were overtaken by lava, but there were no emissions of hydrogen sulfide. Light winds are blowing toward the northwest and ash fall may affect the Volcano and Pahala areas.