Further, the molten lava and heat could rupture the wells at the plant.
US Marine Corps and National Guard helicopters are on standby for an air evacuation if fissure activity cuts off Highway 130, the last exit route for up to 1,000 coastal residents.
Volcanic haze from Kilauea, where fallout from a massive eruption keeps threatening residents, has stretched across the Pacific and threatens residents of the Mariana Islands.
Those in Kapoho - including Kapoho Beach Lots and Vacationland - also were ordered out due to the risk of getting trapped by the lava.
Civil defense officials have previously said about 2,000 residents in and around Leilani Estates were displaced at the outset of the current eruption, which began on 3 May.
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"Persons in violation of this order are subject to arrest and will be liable for any costs associated with rescue operations in the mandatory evacuation area", the county said on its website.
As of Friday, lava has destroyed 82 structures, including 37 homes.
The risky fibers - named after Hawaiian fire and volcano goddess Pele - are produced when lava splatter droplets cools rapidly in the air and can cause skin and eye irritation similar to volcanic ash.
This thermal map shows the fissure system and lava flows as of 12:15 pm on Wednesday, May 30, 2018.
"It's hard to get to the center, which is the hottest portion of the fountain", Stovall said. Lava from another fissure was about 2.8 miles (4.5 kilometers) above the intersection and was advancing in pauses and surges of about 600 yards (548.64 meters) per hour, scientists said. Wind conditions for Wednesday were forecast to result in widespread vog - or volcanic smog- over the Big Island.
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Wind was carrying volcanic glass, gases, pollution and ash particles to other parts of the island.
"We're going to have to say no, that's not safe", the agency's volcanos account replied Monday, saying if the vent was belching volcanic gases, such as sulfur dioxide or hydrogen sulfide, the roasted marshmallows "would taste bad".
"In addition to this potential over the Big Island, some emissions could reach the smaller islands through the day Tuesday".
The month-old eruption of Kilauea, one of the world's most active volcanoes, followed an eruption cycle that had continued nearly nonstop for 35 years. If these lava flows reach the intersection of highways 132 and 137 a large area along the coast and highway 137 will be cut off and become completely inaccessible. If the cracks on Highway 130 would become larger or lava flows would cut off this road, the Chain of Craters Road would be the evacuation road for around 1000 people living in Kalapana southwest of the now active fissure system.
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