What is a flood that occurs within a few hours?

A flood that occurs within a few hours is typically referred to as a flash flood. Flash floods are characterized by their rapid onset, often resulting from intense rainfall, dam breaks, or sudden snowmelt. Due to their swift nature, they can be extremely dangerous, catching people off guard and leading to significant property damage and loss of life. These floods usually happen in areas with steep terrain or urban environments where water cannot easily be absorbed.