PEARL HARBOR, Hawaii (AP) — A handful of centenarian survivors of the attack on Pearl Harbor are expected to gather at the scene of the Japanese bombing on Wednesday to commemorate those who perished 81 years ago.

That’s fewer than in recent years, when a dozen or more traveled to Hawaii from across the country to pay their respects at the annual remembrance ceremony.

Part of the decline reflects the dwindling number of survivors as they age. The youngest active-duty military personnel on Dec. 7, 1941, would have been about 17, making them 98 today. Many of those still alive are at least 100.

About 2,400 servicemen were killed in the bombing, which launched the U.S. into World War II. The USS Arizona alone lost 1,177 sailors and Marines, nearly half the death toll.

📧 Have breaking come to you: Subscribe to News 2 email alerts

Robert John Lee recalls being a 20-year-old civilian living at his parent’s home on the naval base where his father ran the water pumping station. The home was just about 1 mile (1.6 kilometers) across the harbor from where the USS Arizona was moored on battleship row.

The first explosions before 8 a.m. woke him up, making him think a door was slamming in the wind. He got up to yell for someone to shut the door only to look out the window at Japanese planes dropping torpedo bombs from the sky.

He saw the hull of the USS Arizona turn a deep orange-red after an aerial bomb hit it.

“Within a few seconds, that explosion then came out with huge tongues of flame right straight up over the ship itself — but hundreds of feet up,” Lee said in an interview Monday after a boat tour of the harbor.

He still remembers the hissing sound of the fire.

Sailors jumped into the water to escape their burning ships and swam to the landing near Lee’s house. Many were covered in the thick, heavy oil that coated the harbor. Lee and his mother used Fels-Naptha soap to help wash them. Sailors who were able to boarded small boats that shuttled them back to their vessels.

“Very heroic, I thought,” Lee said of them.

Lee joined the Hawaii Territorial Guard the next day, and later the U.S. Navy. He worked for Pan American World Airways for 30 years after the war.

⏩ Read today’s top stories on wkrn.com

The U.S. Department of Veterans Affairs doesn’t have statistics for how many Pearl Harbor survivors are still living. But department data show that of the 16 million who served in World War II, only about 240,000 were alive as of August and some 230 die each day.

There were about 87,000 military personnel on Oahu at the time of the attack, according to a rough estimate compiled by military historian J. Michael Wenger.

The ceremony sponsored by the Navy and the National Park Service will feature a moment of silence at 7:55 a.m., the minute the attack began, and a missing-man-formation flyover.

Navy and park service officials are due to deliver remarks.