A spout of fire that burst from a gas main on Hyde Park Avenue in Roslindale on Sunday was still burning late Monday night, with crews working to install a temporary bypass line, according to the Boston Fire Department.
The fire in a 10-inch gas main began shortly after 6 p.m. near 340 Hyde Park Ave., about a mile south of the Forest Hills MBTA station. Fire crews tried to use sand to smother the flames.
The Fire Department tweeted on Monday afternoon that the fire would be “ongoing at least through today” as the crews install a bypass to effectively cut off fuel to the fire.
The fire continued to burn past 9 p.m. Monday, and National Grid crews were still trying to install the bypass line, said Steve MacDonald, a spokesman for the Fire Department.
Shortly after noon, the work crews were digging two holes in the street where the temporary line would be connected, according to Fire Department’s tweets.
Crews from National Grid “know how best to deal with this in the safe manner,” said MacDonald, “but it’s in consultation with all the city officials here.”
MacDonald said National Grid did not shut off the gas Sunday night because of the extreme cold.
“We’ll try not to shut the gas off, because that will affect hundreds of households, if not thousands,” MacDonald said.
Once the bypass line is installed, and the fire extinguished, National Grid crews would still need to dig up the original pipe to repair or replace it, MacDonald said.
The extreme cold hampered repair efforts, he added.
“The weather certainly isn’t helping,” MacDonald said. “[Crews] are out in full force, [trying to install the pipe],” he said.
National Grid did not immediately return a request for comment Monday night.
Earlier in the day, flames were still shooting into the air from the street, half the height of the surrounding trees.
Sidewalks were covered with sheets of ice from where firefighters had sprayed water.
“I heard they had it under control, but gas is very dangerous,” said Helen Loney, who lives near the fire. “I feel bad for them working out there.”
Three three-decker homes near the fire were evacuated as a precaution on Sunday night.
Neighbors said they weren’t worried by the flames.
“The Boston Fire Department is outstanding,” said a woman named Susan, who lives down the street and declined to give her last name to protect her privacy.
She hadn’t even realized there was a fire until she heard helicopters and fire engines. “I didn’t know what was going on, and then I looked down the street and saw huge flames.”
Both Susan and Loney said they were grateful not to have been evacuated — and to still have heat.
Loney didn’t know where she would put her dog and cat if she had to leave the house. She spent the night watching the flames on television, she said — she wasn’t about to venture out to see them in person. “I’m not that curious in this weather,” she said.
Three of the utility workers at the scene suffered burns and were transported to a nearby hospital for treatment, according to a tweet from the Fire Department.
Globe correspondents Dylan McGuinness and Maddie Kilgannon contributed to this report. Evan Allen can be reached at firstname.lastname@example.org. Follow her on Twitter @evanmallen. Martha Schick can be reached at email@example.com. Follow her on Twitter @MarthaSchick.