The power of thunderstorms can be impressive, as we regularly see in videos when torrential downpours fall on the city of Paris, particularly in metro stations, which quickly become flooded. Liters of water pour out of station entrances into the streets of the capital in a matter of minutes, impacting their operation and often forcing the RATP to close their doors temporarily.
Although the images are often striking, the water is quickly evacuated and the stations reopened within a few hours, despite the fact that the stations are deep underground. So how does RATP 's drainage system work? When heavy water flows into station corridors, ubiquitous gutters channel it to the lowest points of the station, where pits are located.
Very powerful pumps are installed. They empty the pit and discharge the water directly into the Seine or sewer system. The pumps are designed to evacuate several hundred liters of water in just a few minutes. So it's unlikely that the metro will ever really overflow with rainwater!
Metro and RER updates: closures, work, and demonstrations in Paris this Thursday January 29, 2026
In a flash, get all the latest updates on traffic and transportation in Paris, refreshed in real time. Whether it's the Metro, RER, or Transilien services operated by RATP, construction work, ongoing circulation, major events, or demonstrations — we provide all the essential information you need before heading out in Paris this Thursday January 29, 2026. [Read more]
Metro and RER updates: closures, work, and demonstrations in Paris this Thursday January 29, 2026
