MBTA warns ‘extreme heat’ in the forecast could impact train speeds, tracks

The National Weather Service is predicting the apparent temperature will reach between 95 and 100 degrees by the afternoon.

Commuters wait for a train on the MBTA Red Line at the Park Street Station.
–Craig F. Walker / Globe Staff

Commuters should prepare for hot — and potentially slow — travel on the T on Wednesday. 

The MBTA issued an advisory warning that due to the “extreme heat” in the forecast, trains may be operated at a reduced speeds to “compensate for heat-related stress on the tracks, which could result in slightly longer travel times.”

The transportation agency said it will also have crews out inspecting the tracks and making any necessary emergency repairs. 

“Overhead wires that power some of our vehicles expand and sag during extremely hot weather,” the MBTA said. “We’ve been making adjustments to prevent low-hanging wires.”

With the humidity, it could feel between 95 and 100 degrees during the afternoon, according to the National Weather Service. The region is under a heat advisory until 6 p.m. 


“It’s important to stay hydrated, avoid strenuous activities, and try to find shade or air conditioning if possible!” service meteorologists wrote

Scattered thunderstorms are also in the forecast for the afternoon and evening, bringing potentially damaging winds and minor flooding between 3 p.m. and 8 p.m.