FAIRFIELD — A ceremony to commemorate those killed in a catastrophic train derailment two years ago in Lac-Megantic, Quebec, is scheduled to be held Saturday in Monument Park on High Street.

The 2 p.m. observance is meant to highlight the July 6, 2013, event, in which a 74-car freight train carrying crude oil accidentally rolled downhill and exploded in the middle of the small town near the Maine border, killing 47 people and destroying more than 30 buildings.

The groups organizing the observance are using the second-year anniversary of the tragedy to highlight their concerns about transporting volatile crude oil from the Bakken formation deposits in the western U.S. and Canada by train.

“Our stand is that these rolling pipelines have to stop,” said Heidi Brugger, a Freedom resident and one of the event organizers.

The event, organized by environmental and social justice groups 350 Waldo County, SEEDS of Justice and ForestEthics, is part of a Stop Oil Train Week of Action that more than 100 groups across North America are taking part in.

Brugger said organizers were expecting a group of at least 25 to attend.

Attendees are expected to include members from the group 350 Maine who attempted to block a Pan Am freight train passing through Fairfield two years ago. Six of the protesters were arrested at the protest, but the district attorney later declined to press charges.

“Five times in the past five months of 2015, we’ve seen oil trains derail and send toxic fireballs into the sky,” Brugger said in a news release. “Luckily, none of these accidents was fatal; however, each of these trains traveled through heavily populated areas, and would have traveled through more on their way to coastal refineries.”

The organizers point to a 1-mile “blast zone” from the tracks that safety officials recommend for evacuation if a train carrying crude oil derails and catches fire.

The blast zone in downtown Fairfield includes schools, parks, businesses, homes and government offices, according to the organizers.

The event is scheduled to include a reading of the names of the 47 people who were killed in Lac-Megantic, a discussion of the national status of oil transport by train by Meaghan Lasala, of ForestEthics; and a talk by Jade Kurtzer, a student from Lawrence Junior High School who lives in Benton, who will speaking about what it is like to be a student in the blast zone.