SEOUL, South Korea — The United States military said on Monday that it would practice evacuating noncombatant Americans out of South Korea in the event of war and other emergencies, as the two allies began a joint naval exercise amid heightened tensions with North Korea.

It has conducted similar evacuation exercises for decades. But with fears rising in the South that the United States might be preparing for military action against the North, the American military issued a rare news release on Monday stressing that the noncombatant evacuation exercise was a “routinely scheduled” drill.

The drill, known as Courageous Channel, is scheduled from next Monday through Friday and is aimed at preparing American “service members and their families to respond to a wide range of crisis management events such as noncombatant evacuation and natural or man-made disasters,” the United States military said in a statement.

The South Korean government of President Moon Jae-in has repeatedly warned that it opposes a military solution to the North Korean nuclear crisis because it could quickly escalate into a full-blown war in which Koreans would suffer the most.