Causes of Flooding


If Charleston is to be resilient to future flooding, we must commit to understanding the multi-faceted problem. We know the issue is not only related to sea level rise. The amalgam of causes also includes:

  • Antiquated infrastructure
  • Frequent extreme weather-related events
  • Geography
  • Higher groundwater tables
  • Increased precipitation
  • Subsidence 
  • More

All contributors to flooding in our city are and will continue to be monitored and evaluated.

What Causes Flooding Graphic

Learn About Local Flooding Causes

Flooding is caused by many factors, which often combine simultaneously to form a complex, multi-faceted challenge.

Learn more about why Charleston floods when it rains (PDF).

Learn more about how high tides affect our drainage systems.

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