"Svalbard is the ultimate failsafe for biodiversity of crops," said Crop Trust executive director Marie Haga.

Northern temperatures and environment on the island were a major reason for the construction. According to in-depth reporting from CNN, the project planners hoped that the permafrost around the construction of the underground vault would, in time, refreeze. But the planet has other plans.

Longyearbyen and, by extension, the vault, is warming more rapidly than the rest of the planet. That's because the polar regions of Earth—the coldest areas on the planet—are less able to reflect sunlight away from the polar seas due to disappearing ice and snow cover.

It's an ironic turn of events for the creators of the vault, who chose the location for the vault "because the area is not prone to volcanoes or earthquakes, while the Norwegian political system is also extremely stable,'" said CNN.

Because of the warming, the permafrost around the underground vault's tunnel entrance has not refrozen. That led to leaking water in the tunnel in October 2016, which then froze into ice.

In response, CNN reported, "Statsbygg [the Norwegian state agency in charge of real estate] undertook 100 million Norwegian krone ($11.7 million) of reconstruction work, more than double the original cost of the structure."

But the warming now may become unsustainable for the structure. It's already forcing changes to Longyearbyen's population of 2,144 as the people in the town find themselves scrambling to avoid avalanches and deal with a changing climate that's more often dumping rain rather than snow.

"We can't trust the permafrost anymore," said Statsbygg communications manager Hege Njaa Aschim.

British advocacy group Global Citizen was more to the point.

"Not good," the group tweeted.