2019 November 6, “Flash floods close Marches Line in Wales”, in Rail, page 13:
Just before 1300, a train driver reported fast-flowing water near Pontrilas. Flash flooding removed ballast, leaving sections of track suspended in the air.
2021 July 18, Neil Vigdor, “What Is Flash Flooding, and How Can You Avoid It?”, in The New York Times[1], →ISSN:
Flooding occurs in areas where the ground is unable to absorb all of the water, according to forecasters, who explained that flash flooding can also be caused by mudslides or breaks in dams or levees.
