The MBTA is taking preventative measures in wake of the extreme cold.
Many trains were kept inside overnight, shielded from the cold after problems over the weekend.
Temps plunged below zero Saturday night into Sunday, and tracks snapped in nine different spots. Workers used kerosene to light sections of track on fire, using the heat to help straighten it out.
The T says it ran some trains overnight to help prevent tracks and switches from freezing.
The MBTA isn’t the only means of transportation in Boston that faced problems with the cold.
Many flights at Logan Airport were delayed on Sunday because of the freezing cold weather.
Massport said they anticipated problems with the equipment on the ground freezing. A Jet Blue spokesperson told 7News that fueling operations were impacted because of the cold weather and they were trying to operate with precaution while refueling airplanes.
Michelle Hoffman said her flight to Charlotte, North Carolina got pushed back from 2 p.m. She said temperatures up in Maine where she came from were at -21 degrees with a wind chill of -40 degrees.
"I don’t know, our car started just fine this morning, don’t know why the plane hasn’t started yet though," said Hoffman as she killed time at Logan Airport.
(Copyright (c) 2016 Sunbeam Television. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)