Floods & Tsunami

Water is one of the foundations of civilization.

Human societies were born beside rivers, lakes, springs, deltas and coastlines. Water provided drinking supplies, fertile soil, transportation, fisheries, trade and energy. Rivers connected settlements. Oceans connected continents. Floodplains supported agriculture. Coastal cities became centres of commerce and culture.

Yet the same water that sustains civilization can also destroy it.

A river can leave its banks within hours. A cloudburst can turn a familiar street into a torrent. A cyclone can push seawater deep into a coastal settlement. A dam failure can release enormous quantities of water with little warning. An earthquake beneath the ocean can generate a tsunami that crosses an entire basin before reaching distant shores.

These events are often described simply as « natural disasters. » That description is incomplete.

A hazard may be natural. A disaster is also shaped by where people live, how buildings are constructed, whether warnings reach communities, whether evacuation routes work, whether institutions coordinate effectively, and whether vulnerable people have the resources necessary to act.

The central idea of this book is therefore simple:

Understanding hazards is the beginning of reducing disasters.