The historic flooding that devastated Nebraska last week has also submerged one third of an Air Force base, offering a further illustration of the threat posed to national security by climate change.

Flooding at Offutt Air Force Base forced the evacuation of eight planes, including one of four Boeing-made E4-B planes that are supposed to act as an aerial command center if ground bases are destroyed in an emergency like a nuclear attack, Reuters reported. Waters inundated 30 buildings at the base.

"It is extremely clear that we face a grand challenge," Colonel Michael Manion, 55th Wing Commander said in a Facebook post reported by The Verge.

Offutt Base also houses Strategic Command, which is in charge of the nation's nuclear weapons, but its headquarters was on a hill and not impacted by the floods.

The incident comes as the Trump administration is considering forming a panel on whether or not climate change poses a national security risk, which would be headed by staunch climate denier William Happer. The Pentagon already found that climate change posed a threat to military bases in January, and former military and intelligence leaders have written to President Donald Trump urging him not to challenge those findings. The flooding at Offutt base has prompted further criticisms of Trump's denialism. "This is an example of a vital threat to our national security from a climate-related disaster, and more of this kind of thing is likely in the future," Center for Climate and Security co-founder Francesco Femia told Reuters, saying the incident showed why Trump should not interfere with military assessments of climate risk. The Pentagon report released in January did not list flooding as a potential climate risk to Offutt Base. Instead, the report said the base was most likely to be impacted by drought, The Washington Post reported.