Firefighters salute as Capt. Joel Barnes' casket is driven down Spring Street for a memorial service at Portland's Cross Insurance Arena on Sunday morning. Barnes died fighting a fire in Berwick on March 1.

The funeral procession for Berwick's Capt. Joel Barnes leaves South Portland's Central Station on Sunday morning for the memorial service in Portland.

Firefighters line up along Spring Street to prepare for the funeral procession of Capt. Joel Barnes in Portland on Sunday.

Capt. Joel Barnes' casket is driven down Spring Street to the Cross Insurance Arena for his funeral.

Firefighters line Spring Street for the funeral procession of Capt. Joel Barnes at the Cross Insurance Arena.

The Maine Turnpike northbound in Scarborough on Sunday.

Firefighters salute as Capt. Joel Barnes' casket is driven down Spring Street to the Cross Insurance Arena for his funeral in Portland on Sunday.

Firefighters and color guard line Spring Street before a Berwick firetruck transports Capt. Joel Barnes' casket to his final resting place after his funeral at the Cross Insurance Arena on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

Portland firefighters salute as a Berwick firetruck transports Capt. Joel Barnes' casket to his final resting place after his funeral at the Cross Insurance Arena on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

Brad Gorman, with the South Berwick Color Guard, lines up on Spring Street to await the funeral procession of Berwick firefighter Capt. Joel Barnes on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

A Berwick firetruck transports Capt. Joel Barnes casket to his final resting place after his funeral at the Cross Insurance Arena on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

Firefighters salute as Berwick firefighter Capt. Joel Barnes' casket is brought out of the Cross Insurance Arena after his funeral on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

PORTLAND, ME - MARCH 10: Thousands of firefighters attend the funeral of Berwick firefighter Capt. Joel Barnes in at the Cross Insurance Arena on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1. (Staff photo by Brianna Soukup/Staff Photographer)

Berwick fire Chaplin Joe Chambers rest his hand on Berwick firefighter Capt. Joel Barnes's casket after saying a prayer during his funeral at the Cross Insurance Arena on Sunday, March 10, 2019. Barnes died fighting a fire in Berwick on March 1.

Joel Barnes is believed to be the first Maine firefighter killed in the line of duty in nearly 40 years. At right, his helmet is carried forward at the start of the service.