Generalized rain returned to France between Tuesday and Thursday, marking the first widespread rainfall of the meteorological autumn of 2026. The change in weather was abrupt across many regions on Wednesday, October 7, linked to the rise of a depression moving up from the Gulf of Gascony toward northern France. Rains, sometimes accompanied by thunderstorms, gradually reached most regions before evacuating eastward on Thursday. Forecasts anticipate generally 10 to 30 mm of rainfall over much of the country, with totals occasionally reaching 30 to 50 mm from the Southwest to the center-east, while some regions near the Channel remained closer to 5 to 15 mm. In Île-de-France, rainfall was expected to be fairly homogeneous with generally 10 to 20 mm, locally a bit more in the south and east of the region. From the Center to the Northeast, the rainfall could present the best ratio between quantity and efficiency. These regions had experienced an extremely dry September, often with 70 to 90 percent of precipitation deficit. The expected totals reached generally 15 to 30 mm, sometimes more, under relatively spread-out rainfall over time. This type of precipitation is precisely the most favorable: rain sufficient enough to moisten several centimeters of soil, but not so violent as to cause massive runoff. Crops, pastures, and vegetation should therefore benefit quickly. In Île-de-France, the totals should rather be around 10 to 20 mm, locally 20 to 25 mm. It is not spectacular, but after several dry weeks, this rain can be well absorbed. It will mainly allow the surface soils to be rehumidified and temporarily limit their drying. However, it will remain insufficient to make up for the deficit accumulated since the summer. From Poitou to Limousin, Aquitaine, and the interior of Occitanie, the amounts will often be between 15 and 30 mm, with locally 30 to 50 mm. Here too, these rains come at a timely moment given the persistent drought. However, their effectiveness will depend on their intensity: under the strongest showers, a larger portion of the water may run off rather than gradually penetrate the soils. In the Southeast, the largest amounts of precipitation will fall, often 50 to 100 mm and locally 100 to 150 mm. These rains will obviously help to moisten the soil, but their hydrological effectiveness will be very variable. When 50 or 100 mm fall quickly under thunderstorms, the soils cannot absorb all of it: a significant portion of the water directly joins the watercourses or runs off to low points. In other words, 100 mm under a Mediterranean thunderstorm do not correspond to 100 mm actually stored in the soil. Nationally, the most beneficial rains should therefore be those from the Center, the center-east, and the Northeast, where three conditions will be met: a significant water deficit, significant totals of 15 to 30 mm, and generally moderate intensity. This sequence will thus mark a notable rehumidification of the soils. However, to really exit the drought, it will be necessary for other regular rainy episodes to follow during the autumn: it is their repetition, more than a single exceptionally abundant episode, that will then allow water to reach the deeper layers and begin the recharge of aquifers.