Flooding at a U.S. Air Force base in Nebraska that damaged buildings and forced the removal of a plane integral to the nation's nuclear attack response highlight the risks climate change poses to national security, experts said on Monday.

U.S. President Donald Trump has repeatedly questioned whether humans cause climate change and has been angered by assessments from his military and intelligence agencies that say the phenomenon poses national security risks.

Last week's "bomb cyclone" storm flooded about 60 structures including 30 buildings at the Offutt Air Force Base, said Ryan Hansen, a spokesman for the 55th Wing, a unit providing reconnaissance, intelligence and combat support to U.S. leaders.