Metro-North is warning commuters to expect shorter trains than normal this week and said crowded conditions and delays are possible.
Light rain on Dec. 5, at a time when leaves have fallen, created slippery rail conditions, which caused damage to train wheels during braking, according to Metro-North.
Because of that, several train cars are unavailable because they need to be repaired.
Cars with wheels that are damaged beyond Federal Railroad Administration safety limits have to be removed from service.
Metro-North said it placed 30 extra personnel on the main floor of Grand Central Terminal to assist with customer information, and will continue extra staffing until the situation is resolved.