Heatwave Slows Trains: Transport Minister Tabarot Calls It a Challenge on All Levels

Paris – 30 June 2026: Transport Minister Philippe Tabarot described the effects of the current heatwave on rail traffic as “practically a human, logistical and technical challenge.” In an interview with Franceinfo he pointed to acute risks for infrastructure and operational safety and announced additional coordination with the SNCF and the prefectures.

According to the minister, high temperatures are forcing operators to reduce speeds and make selective cancellations. The main causes are the thermal expansion of rails, changed tensions on overhead lines, and signal boxes and signalling systems that are prone to overheating. Experts also point out that older network sections react more sensitively because materials and maintenance cycles were not designed for recurring extreme values. To avoid derailments, cable breaks and smoldering incidents, routes are locally relieved or diversions are set up.

Commuters and long-distance travelers feel the consequences alike. Regional trains had to be removed from schedules or combined in several departments; some long-distance services are experiencing extended journey times. Stations are preparing additional drinking water and information points, and mobile teams are assisting stranded passengers. Tabarot emphasized the strain on staff: track supervisors, maintenance crews and train teams are working at capacity limits during heat phases, and emergency and evacuation plans are being rehearsed more frequently.

In the short term, the ministry says it is relying on coordinated local measures: flexible speed thresholds depending on rail temperature, more frequent inspections of switches and overhead lines, and additional ventilation and cooling options at critical signal box sites. The SNCF is informing travelers through enhanced real-time alerts in apps and at stations; tickets on affected routes can in some cases be rebooked without fees.

In the medium term, the heat resilience of the networks moves into focus. Tabarot cites modernized overhead lines, modified rail fastenings and extended expansion zones as levers, as well as more robust electronics in interlockings. Experts see this, however, as a multi-year process with high investments and complex construction planning while operations continue. At the same time, the heatwave poses strategic decisions for coordination between the state, regions and the infrastructure operator: which corridors will be upgraded first, how construction schedules will be coordinated with traffic plans, and what reserves are needed for peak situations?

The recent wave of disruptions underscores that extreme weather events are shifting priorities in the transport sector. While acute protective measures are intended to secure operations, the question of resilient networks for coming summers is becoming more pressing. Tabarot announced that he will agree concrete timetables for investments and maintenance with the regions and the SNCF.