France’s third intense heatwave of the year collided with Bastille Day traffic on 13–14 July, triggering wildfires that forced temporary closures of key transport arteries. A roadside blaze near Fontainebleau cut the high-speed LGV Sud-Est between Paris and Lyon for six hours on Monday evening, stranding several TGVs and causing knock-on delays into Tuesday morning, according to SNCF Réseau. Local media reported passengers sleeping on station floors as crews worked overnight to clear debris and inspect catenary lines. Road traffic was no better: authorities closed sections of the A6 and A77 south of the capital while firefighting planes operated overhead, and motorists on the first public holiday of the summer were rerouted onto smaller departmental roads. National broadcaster TF1 warned that journeys from Île-de-France to Mediterranean resorts could take up to three hours longer than usual. Regional press in Occitanie and Auvergne-Rhône-Alpes likewise urged drivers to travel early or postpone departures. SNCF says high-speed services are now running "near normal," but it has cancelled roughly one in three Intercités daytime trains to reduce the risk of pantograph overheating and speed-restricted freight congestion. Corporate mobility teams should advise travellers to monitor the SNCF Assistant app and allow generous transfer windows, especially for onward Eurostar or flight connections in Paris and Lyon. Wildfire-related travel disruption is increasingly material for business-continuity planning. Insurance brokers note that several global firms activated contingency clauses for time-critical engineers heading to semiconductor plants in Grenoble and aerospace sites in Toulouse. Some diverted via Montpellier or Bordeaux airports and completed the journey by hire car. France’s interior ministry has not ruled out further preventive line closures if temperatures remain above 38 °C. Take-away for global-mobility managers: 1) build flexibility into travel authorisations through 16 July when cooler weather is forecast; 2) remind assignees of France’s legal ban on lighting fireworks, barbecues or smoking in designated forest zones; and 3) check that relocation contracts cover additional hotel nights if rail connections are lost.
