Flash floods are sudden, violent floods that occur within a short time of heavy rainfall, often within hours or even minutes. They can rapidly fill streets, basements, and entire floors of buildings with water. Flash floods occur due to several factors, including heavy rain, rapid snowmelt, or the collapse of a man-made structure like a dam, overwhelming the drainage capacity in an area. In urban environments, impervious surfaces like concrete prevent water from naturally soaking into the groun...