In the Marshall Islands, climate change is an existential threat.

Alternating droughts and cyclones are wreaking havoc on the Pacific island nation of 52,000 people. Rising tides could even submerge the entire country within decades.

As coastal homes become uninhabitable, the Marshallese are starting to seek refuge in other countries. Thousands of those "climate refugees" could find a safe haven in an unlikely town in the American heartland.

Springdale, Arkansas, may be 6,000 miles away from the Marshall Islands, but it is the unexpected home to a thriving Marshallese community.

Nearly 7,000 Marshallese live in Springdale, by far the largest such community in the mainland US. The greater region of northwestern Arkansas has at least 12,000 — more than a fifth of the Marshall Islands' population. It is second only to that of Honolulu.

Unlike Hawaii, Springdale has no history of any other Pacific Islander migration or settlement.

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"The Marshallese are living in Springdale with no template," wrote UCLA researcher Jessica Schwartz in her paper "Marshallese Cultural Diplomacy."

Nestled in the Ozark Mountains, the town of 75,000 boasts a Marshallese radio station and the country's only Marshallese-language newspaper.

Marshallese people come to the US primarily for jobs, education, and health care, said Carmen Chong Gum, consul general of the Marshallese consulate in Springdale — the only such consulate in the continental US. But she said Springdale residents could soon expect the community to swell with climate refugees.

"Climate change is really happening. It's a reality," Chong Gum told Business Insider. "If it continues to be a reality, that would be another reason added to the list — families coming that have lost their homes to the sea."

The Marshall Islands' close relationship with the US

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The Marshall Islands benefits from a close, albeit complicated, relationship with the US.

America used the islands as a test theater for 67 thermonuclear weapons between 1946 and 1958. The most famous of these, the "Bravo shot," was dropped on Bikini Atoll in 1954 and was 1,000 times more powerful than the bomb dropped on Hiroshima.

Residents of Bikini were displaced, and the atoll remains uninhabited today. Large swaths of the islands still suffer from nuclear contamination.

In 1986, the US agreed to the Compact of Free Association, which stipulated that Marshallese citizens can emigrate freely to the US and stay indefinitely without visas.

"Basically it's what we get in return for allowing our islands to be used by the United States for testing nuclear weapons," Chong Gum told Business Insider.

Hundreds of displaced Bikinians now live in Springdale, according to Schwartz's research.

The Marshallese diaspora

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