Public forest managers conduct a safety tour to try to identify trees and branches that could represent a danger. To examine the 40 woods and forests belonging to the regional council, it takes “a good week” for the 40 field agents from Île-de-France Nature.

Storm Louis put the region's massifs to the test. The squalls of February 22 damaged certain forests. Their managers try to identified plants that could lead to a tree fall. The region was hit by gusts of up to 110 km/h on February 22.