The heatwave continues to weigh on the transports of Île-de-France this Wednesday, June 24, 2026, as temperatures are still expected to flirt with 40°C in the afternoon. Across the network, from Paris (75) to the outer ring, Île-de-France Mobilités (IDFM) is adapting its transport plan day by day and urges people to limit or delay their trips, or even to favor telework.
According to Île-de-France Mobilités, several lines could experience slowdowns this afternoon. On the subway side, lines 5, 6, 8 and 13 are to be watched, as are the tram lines T1, T2, T5 and T6.
For the RER, it’s the southern stretches of lines A and B that are raising concerns: depending on how temperatures evolve, speeds could be cut, with knock-on effects on service. On the rest of the network (RER C, D and E, and the northern part of RER B), the impact should be limited, with about nine trains running for every ten on average and a few additional cancellations possible as the day goes on.
The Transilien network (lines H, J, K, L, N, P, R, U and V) is also faring relatively well, with about nine trains out of ten expected to run. Preventive cancellations affect mainly a few trains during the morning and evening peaks. Good news to end: service on the bus network and the C1 cable line is expected to be back to normal.
The heatwave is taking a toll on the equipment. In the scorching sun, rails can top 50°C: steel expands, electrical systems overheat, and the air conditioning on the trains can struggle to keep up.
To prevent an incident, SNCF is lowering speeds and proactively suspending certain services, a situation that evolves daily based on the impacts observed. IDFM recommends planning ahead: trains that remain in service can be checked the evening before at 5 p.m. on the IDFM app, on Transilien.com and on SNCF Connect. You are also advised to travel with a reusable bottle, which you can refill at one of the network's water fountains.
These disruptions occur amid an extraordinary episode. The red heat alert remains in effect on Wednesday, June 24, across Île-de-France, according to Météo-France, the day after France recorded its hottest night since 1947. Several sites have adjusted their hours: the Eiffel Tower closed at 4 p.m., and the Louvre closes early from June 24 to 27.
To get around differently, the antipollution pass (5.10€ per day, unlimited journeys) is renewed this Wednesday. A lull is expected for the weekend. To stay informed, check out our overview of transportation disruptions from June 22 to 28, 2026 and our article Paris and Île-de-France heatwave: when will it end?
Dates and Opening Time
On June 24, 2026
Location
Paris and the Île-de-France region
Paris
75 Paris
