Flash floods can happen almost anywhere from New York City subways and the rivers of Central Texas to mountain villages in Italy, the streets of China, and communities across Europe, Asia, and Africa. Why do they become deadly so quickly, even when people know heavy rain is coming?

In this episode of Meteorology Matters, we explore the science behind one of the world’s fastest and most misunderstood weather hazards. Through unforgettable disasters and the lessons they taught, we explain how rainfall, terrain, infrastructure, forecasting, and human behavior combine to create life-threatening situations in just minutes.

You’ll learn why some storms produce catastrophic flooding, how meteorologists detect these events, what today’s warning systems can and cannot do, and the decisions that often determine who sur ...