The agency put out an alert during the evening commute on Tuesday, saying that they were experiencing heat-related rail equipment issues affecting air conditioning units and other electronic components.
They told customers that they may experience delays, and it could be necessary to "cancel or combine select trips for the next 48-72 hours."
The agency said the issues involve old trains, old overhead wires and an old Portal Bridge.
"Our rail maintenance crews are working diligently to make repairs & restore equipment as quickly as possible," the agency said in a statement. "We apologize for any inconvenience."
Gov. Phil Murphy has called the performance of late unacceptable.
New Jersey Transit is urging riders to check their website or mobile app for the latest updates and info.
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Trouble ahead, trouble behind on New Jersey Transit
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