A train wreck, or train disaster, occurs when a train collides with another object, derails, or experiences a catastrophic failure. These incidents can result from various factors, including human error, mechanical failure, or external obstacles on the tracks. The consequences often include injuries, fatalities, and significant damage to property and infrastructure. Emergency response teams typically arrive quickly to manage the situation, providing medical assistance and securing the area. Investigations follow to determine the cause of the wreck, often involving agencies like the National Transportation Safety Board (NTSB) in the United States. Safety measures are then reviewed to prevent future incidents.