They haven't been idle.
The firefighters of Val-d'Oise received more than 400 requests for intervention following the storms which fell on the department, Tuesday August 16 in the evening.
This gave rise to 229 operations, some of which were still in progress on Wednesday morning.
Rescue services intervened in Argenteuil, Saint-Gratien, Sannois, Franconville, Deuil-la-Barre, Eaubonne, Ermont, Le Plessis-Bouchard, Saint-Leu-la-Forêt, Saint-Prix, Soisy-sous-Montmorency and Taverny.
The two major interventions of the night took place in Taverny and Herblay.
The first concerned the Le Castel retirement home in Taverny.
Twenty-five rooms in this establishment experienced flooding, but they did not cause any major disruption to its operation.
The firefighters only carried out drying operations.
He has had no requests for relocation.
The Ermont swimming pool closed for an indefinite period
In Herblay, the roof of the Isabelle-Autissier college was damaged.
It was necessary to remove elements that threatened to fly away.
Firefighters have set up two advanced command posts in Franconville and Argenteuil.
Their purpose was to deal with non-emergency interventions.
Most of the interventions took place for flooded cellars, trees falling on the electrical network or water in dwellings after glass or roof breakage.
The town hall of Ermont announced that the boiler room of the Marcellin-Berthelot swimming pool had been flooded.
The facility is therefore closed for an indefinite period.