The roads were unpaved and in rainy seasons impassable. The weather soon deteriorated again, with the roads once more turning into impassable, muddy quagmires. Winds topped , knocking down trees and powerlines and making roads impassable. In clearings it often forms dense and impassable thickets. Several mudslides were reported, which left numerous highways blocked or impassable. More than 1,000 accidents were reported and some commuters abandoned their cars amidst impassable roads. Villages had been destroyed, and derelict equipment made some roads impassable. Thirteen communities in Nicaragua were completely isolated after Keith made roads impassable. Stewart County, received over of rain which caused extensive flooding that left several roads impassable. Multiple rockslides also occurred, making all roads to the city impassable. He was small enough to crawl through gullies impassable to most of his colleagues. For humans, they make dense, impassable forests traversable. They tried to reach the summit of the island but found the cliffs impassable. There is occasionally a danger of collapsing glaciers which can render the path virtually impassable. Both rapids were considered virtually impassable.