Taipei, Sept. 23 (CNA) Floodwaters from Matai'an Creek Barrier Lake in Hualien County surged into Guangfu Township on Tuesday, sweeping vehicles downstream and causing residents to scramble for safety. Photo courtesy of a Facebook group "Hualien" Sept. 23, 2025There were also images of vehicles, including several military trucks, being swept away on Provincial Highway 9. Cars float on the Matai’an Creek barrier lake flood waters in Hualien on Tuesday. Floodwaters from the Matai’an Creek barrier lake have receded, leaving mud on the road in Hualien on Tuesday. A barrier lake is formed when debris, landslides, or natural blockages create a temporary dam along a river, holding back water.