About 40 kilometers (25 miles) down Kilauea's east flank, lava gushed from six giant cracks, with molten rock from two fissures advancing over another street of homes in the Leilani Estates housing development, the observatory said in a statement.
Local residents fear the wells may be explosive when they react to the horrifying heat of magma.
A lava flow in Hawaii has entered the property of a geothermal power plant on the Big Island. The slow-moving lava flow has disrupted the lives of many on the island, but officials have kept a very close eye on everything to ensure that nobody gets caught off guard (unless you're a Ford Mustang).
The ongoing eruption, which has produced rivers of lava, is also threatening to cover more wells at a geothermal power station.
While eruptions continue at the main crater, Kilauea's lava flows have also proven extremely risky for bystanders and residents who refused to evacuate.
An incredible timelapse video has emerged showing lava from Hawaii's Kilauea volcano invading a backyard as it now enters its fourth week of destructive eruptions.
As of Friday, lava has destroyed 82 structures, including 37 homes.
"Everyone is having symptoms now on some level, " said Dr. Josh Green, a state senator and emergency room physician who has been volunteering in communities where lava fissures have opened in neighborhoods. "Primary concern is sulfur dioxide from the eruption and lava coming on site".
Officials earlier this month removed 50,000 gallons (189,265 liters) of a flammable gas called pentane from the plant to reduce the chance of explosions.
Winds are set to shift on Monday and Tuesday, causing higher concentrations of ash and volcanic smog that will spread west and northwest to affect more populated areas, said National Weather Service meteorologist John Bravender.