Upooted trees were found on track at various places between Mettupalayam and Coonoor, necessitating cancellation of services for today, railway sources said.
The area has been experiencing moderate to heavy rains resulting in landslide and uprooting of trees, they said, adding restoration works are in progress and are expected to be cleared by evening.
NMR is a major tourist attraction during summer when visitors from across the world throng Nilgiris District, which has a large number of tourist spots.