PAHOA, HI - MAY 5: In this handout photo provided by the U.S. Geological Survey, lava errupts from a new fissure from Luana Street after the eruption of Hawaii's Kilauea volcano on May 5, 2018 in the Leilani Estates subdivision near Pahoa, Hawaii. The governor of Hawaii has declared a local state of emergency near the Mount Kilauea volcano after it erupted following a 5.0-magnitude earthquake, forcing the evacuation of nearly 1,700 residents. (Photo by U.S. Geological Survey via Getty Images)
Handout/Getty Images North America/Getty Images
PAHOA, HI - MAY 5: In this handout photo provided by the U.S. Geological Survey, lava errupts from a new fissure from Luana Street after the eruption of Hawaii's Kilauea volcano on May 5, 2018 in the Leilani Estates subdivision near Pahoa, Hawaii. The governor of Hawaii has declared a local state of emergency near the Mount Kilauea volcano after it erupted following a 5.0-magnitude earthquake, forcing the evacuation of nearly 1,700 residents. (Photo by U.S. Geological Survey via Getty Images)
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In this May 24, 2018 photo from the Federal Emergency Management Agency, lava erupts from a fissure in the Leilani Estates neighborhood near Pahoa on the island of Hawaii. Three lava flows from eruptions of Kilauea volcano are now flowing into the ocean off Hawaii's Big Island. Hawaii County officials say the third flow started pouring into the sea Thursday. Lava is spewing from a fissure in a rural community that's feeding the two other flows that are reaching the waves. (Grace Simoneau/FEMA via AP)
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In this May 24, 2018 photo from the Federal Emergency Management Agency, lava erupts from a fissure in the Leilani Estates neighborhood near Pahoa on the island of Hawaii. Three lava flows from eruptions of Kilauea volcano are now flowing into the ocean off Hawaii's Big Island. Hawaii County officials say the third flow started pouring into the sea Thursday. Lava is spewing from a fissure in a rural community that's feeding the two other flows that are reaching the waves. (Grace Simoneau/FEMA via AP)
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A slow-moving flood of lava destroyed hundreds of homes in the southeast area of Big Island, turning what had been a scenic bay dotted with beach homes, lush greens and turquoise waters, into a dark slab of steam and lava.

By Tuesday morning, the lava had completely filled Kapoho Bay – shocking residents and frequent visitors who realized that their beloved bay was gone. It was where vacationers enjoyed tide pools, snorkeling and picnics, reported CNN affiliate Hawaii News Now.

As of the morning of June 5, the fissure 8 lava flow front had completely filled Kapoho Bay.
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As of the morning of June 5, the fissure 8 lava flow front had completely filled Kapoho Bay.

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A satellite image from 2016 shows Kapoho Bay on the island of Hawaii before the Kilauea volcano erupted, and an image taken on June 4, 2018 with lava spilling into the bay.

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So far, it was unclear how many homes have been affected, but Hawaii Civil Defense Administrator Talmadge Magno said it was fair to say it was hundreds. The lava pushed into beach lots in Kapoho, which has about 350 homes and Vacationland, which has about 150. This doesn’t mean all homes were affected, but authorities will have to count and match the areas with property maps.

About 80% of the homes are believed to be vacation homes, Magno told reporters Tuesday.

Lava from one of the fissures entered Kapoho Bay late Sunday or early Monday, forcing billowing clouds of steam into the atmosphere as hot lava hit the cool water of the Pacific Ocean. Fissure 8 was very active overnight into Tuesday, producing large amounts of lava that destroyed homes. The lava flow extended 0.8 miles from the shore.

“It’s a slow-moving flood. Nothing stops it and the direction it goes,” Magno said of the lava flow. “It continues its march to the ocean.”

Helicopter overflight on June 4, showed lava from fissure 8 entering the ocean at Kapoho Bay.
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Helicopter overflight on June 4, showed lava from fissure 8 entering the ocean at Kapoho Bay.

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Hawaii County Civil Defense authorities also warned about laze, a nasty mashup of lava and haze that sends hydrochloric acid and volcanic glass particles into the air. The large laze plume was blowing inland along the coastline and the agency warned residents to avoid the area.

At least 117 homes have been destroyed since lava began flowing, Magno said, but this doesn’t include those affected in Kapoho and Vacationland.

CNN’s Dan Simon, Stephanie Becker and Hollie Silverman contributed to this report.