Floods

Flooding is worsening with climate change and urban growth. Learn what causes floods, their impacts, and how to build resilience.

The Basics of Flooding Key Takeaways

Key Takeaways: 

  • Flooding is the overflow of water onto normally dry land, resulting from various natural and human-induced factors.​
     
  • Types of flooding include fluvial (river), pluvial (surface water), coastal, flash, groundwater, and urban flooding, each with distinct causes and characteristics. ​
     
  • Natural causes of flooding encompass heavy rainfall, rapid snowmelt, storm surges, and ice or debris jams. ​
     
  • Human-induced factors such as deforestation, urbanization, poor land use practices, and infrastructure failures can exacerbate flood risks. ​
     
  • Climate change is leading to more frequent extreme weather events and higher sea-levels, resulting in a higher risk of flooding.