There are several reasons that have caused the cancellation of dozens of trains on the Howrah-Chennai line. Here are some of the main factors:

• Unsafe weather conditions: The massive Cyclone Amphan and subsequent heavy rain and gusty winds have severely damaged the railway tracks and infrastructure, leading to cancellations.
• Track maintenance and upgrading: There are some areas where maintenance and upgrading of the railway tracks is ongoing, and this has led to the cancellation of trains.
• Delays in freight services: There have been severe delays in freight services that have resulted in congestion on the tracks, causing passenger trains to be cancelled or rerouted.
• Shortage of staff: The COVID-19 pandemic has led to staff shortages, which has made it difficult to manage the operations of all the trains.

Overall, these factors have created significant challenges for train operations on the Howrah-Chennai line and caused a significant inconvenience to commuters.