Tuvalu is one of the least visited countries on Earth. A single airline, Fiji Airways, operates the only scheduled flights connecting Fiji’s capital of Funafuti a few times a week, and there is no other way to reach the country by air. The entire country is made up of nine coral atolls covering approximately 26 square kilometres, smaller than many major airports, and home to less than 11,000 people. Life here has always been different from much of the world, shaped by close communal ties and a cash-based economy, with the first ATMs only recently installed. But scientists now warn that Tuvalu faces a bigger question than isolation: whether the country will remain habitable as sea levels continue to rise.
Why is Tuvalu considered one of the most unsafe countries on Earth?
The islands of Tuvalu lie at an average elevation of only two meters above sea level, the lowest of any country on the planet. According to a technical report titled Assessment of Sea Level Rise and Associated Impacts for Tuvalu, produced by NASA’s Sea Level Change Team in support of the United Nations-supported Rising Nations Initiative, Tuvalu has already begun to experience measurable impacts from the combined effects of rising oceans, storm surges, and natural ocean variability, with the report expected to worsen in the coming years.
What NASA’s analysis actually found
According to NASA’s Jet Propulsion Laboratory, Pacific island nations including Tuvalu, Kiribati and Fiji will experience at least 15 centimeters of sea level rise over the next 30 years, with the agency describing this figure as effectively locked in, regardless of further changes in global greenhouse gas emissions. The analysis was conducted by researchers at the University of Hawaii, in collaboration with scientists from the University of Colorado and Virginia Tech, at the request of Pacific island governments and in coordination with the United States Department of State. Nadya Vinogradova Schieffer, who directs ocean physics programs within NASA’s Earth Sciences Division, said sea levels will continue to rise for centuries, flooding coastal communities across the region regardless of near-term emissions decisions.
The rising tide is already visible on land
Grace Mali, a youth leader from Tuvalu with the Rising Nations Initiative, told NASA that accurate science and data can help her community understand what these sea level projections really mean in practice, adding that the information also supports early warning systems the country is actively developing. Mali described the stakes clearly, saying that the future of Tuvalu’s youth is already at stake, and that climate change represents a matter of justice and survival rather than simply an environmental concern. NASA researchers have noticed a real lack of on-the-ground measurement data in Pacific countries like Tuvalu, which is why the agency has begun combining satellite-based sea level data with ground station measurements and more detailed land elevation mapping, especially for these vulnerable coastlines.
Daily life on a shrinking runway in the middle of the ocean
Despite the scale of the threat, Tuvalu is almost completely cut off from global tourism. Fiji Airways is the only carrier serving the country, and flights operate only a few times each week between Funafuti and Fiji, making Tuvalu one of the most difficult countries in the world to easily visit. Funafuti International Airport itself is modest by international standards, with a single terminal building so close to the surrounding village that locals can walk straight to the runway whenever there is no flight scheduled.
A cash economy that has recently modernized
Until recently, every transaction by locals and visitors to Tuvalu had to be made entirely in cash, as there were no ATMs anywhere on the country’s islands. This changed in April 2025, when the National Bank of Tuvalu, the country’s only bank, installed the country’s first five ATMs on Funafuti, including machines in Waiaku village and the airport. Prime Minister Feleti Te’o described the moment as an important milestone for the country, while Bank General Manager Siose Te’o called it a transformational switch that will open the door to broader economic participation for Tuvaluans. Even with this change, banking infrastructure across the country remains extremely limited compared to almost any other part of the world.
Why does such a small country make such large-scale bets?
Whatever further infrastructure changes occur, the main threat facing Tuvalu remains what NASA’s sea level science team has been documenting for years: a slow, largely irreversible rise in sea level that not only threatens periodic flooding but also threatens the country’s long-term livability. With no natural heights to retreat to and limited land available for adaptation, Tuvalu has become one of the clearest real-world test cases of what rising seas mean for entire countries, not just coastlines, making its quiet, rarely visited atolls the subject of increasing scientific and diplomatic attention far beyond their small population and remote location in the middle of the Pacific.