A train derailment occurs when a train leaves its tracks, which can happen due to various reasons such as track defects, equipment failure, or obstacles on the tracks. This incident can lead to significant damage to the train, cargo, and surrounding areas, and may also pose risks to passengers and crew members. When a train derails, emergency services often respond quickly to assess the situation and provide assistance. Investigations are conducted to determine the cause of the derailment, which can involve examining the railway infrastructure, train components, and any environmental factors that may have contributed to the incident.