Lava evaporated a freshwater lake on Hawaii's Big Island

Hawaii's Green Lake was about 400 years old and one of the only freshwater lakes on the Big Island. But now, it's basically gone.

Lava flowed into the lake Saturday and evaporated all of its water within hours. Officials reported seeing huge plumes of steam coming from the lake. Now, lava sits where 200 feet of water once was.

"I've never even heard of anything like that happening before," said Drew Kapp, a geography instructor at Hawaii Community College.

SEE MORE: Why Are The Kilauea And Fuego Volcano Eruptions So Different?

The Green Lake — located in a rainforest on the eastern side of the island — was a popular swimming spot for locals and tourists.

A spike in the Kilauea volcano's eruption began a little over a month ago. So far, lava has reportedly covered at least 5,000 acres, destroyed at least 279 homes and forced many evacuations.

Additional reporting from Newsy affiliate CNN.

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Lava erupts on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 19, 2018. REUTERS/Terray Sylvester
Lava flows through trees on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 19, 2018. REUTERS/Terray Sylvester
Lava erupts on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 19, 2018. REUTERS/Terray Sylvester
Lava erupts on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester TPX IMAGES OF THE DAY
Lava flows through forest on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester
Gas erupts from a lava flow on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester
Lava flows past trees on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester
Lava flows through forest on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester
Lava erupts on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 18, 2018. REUTERS/Terray Sylvester
KAPOHO, HI - MAY 20: A lava fountain from a Kilauea volcano fissure erupts, while forming a new cone, on Hawaii's Big Island on May 20, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 19: Residents view lava erupting from a Kilauea volcano fissure, at a small viewing party on a neighbor's porch, on Hawaii's Big Island on May 19, 2018 in Kapoho, Hawaii. Some local residents have held small viewing parties to view lava. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 19: A bird rests on a wire as lava from a Kilauea volcano fissure erupts on Hawaii's Big Island on May 19, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 19: Lava from a Kilauea volcano fissure flows on Hawaii's Big Island on May 19, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 19: A young resident keeps an eye on lava from a Kilauea volcano fissure erupting and flowing near her home on Hawaii's Big Island on May 19, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 18: A man takes a photo of a lava fountain from a Kilauea volcano fissure on Hawaii's Big Island on May 18, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 18: Lava erupts and flows from a Kilauea volcano fissure as trees burn on Hawaii's Big Island on May 18, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 18: Lava erupts and flows from a Kilauea volcano fissure on Hawaii's Big Island on May 18, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 18: Lava erupts and flows from a Kilauea volcano fissure on Hawaii's Big Island on May 18, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
KAPOHO, HI - MAY 18: Lava erupts and flows from a Kilauea volcano fissure on Hawaii's Big Island on May 18, 2018 in Kapoho, Hawaii. The U.S. Geological Survey said the volcano erupted explosively on May 17 launching a plume about 30,000 feet into the sky. (Photo by Mario Tama/Getty Images)
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