Floodsmart.gov The official site of the National Flood Insurance Program
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- What Causes Flooding
- Dams
- Flash Floods
- Flood After Fire
- Heavy Rains
- Ice Jams
- La Niña
- Levees
- Mudflows
- New Development
- Snowmelt
- Spring Thaw
- Tropical Storms and Hurricanes
- West Coast Rainy Season
- Defining Flood Risks
- Understanding Flood Maps
- Undergoing a Map Change
- Flood Map Update Schedule
- Floodsmart Video Library
- Flood Risk Scenarios
- The Cost of Flooding
- The Levee Simulator
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Ice Jams
Long cold spells can cause the surface of rivers to freeze, leading to ice jams. When a rise in the water level or a thaw breaks the ice into large chunks, these chunks can become jammed at man-made and natural obstructions, resulting in severe flooding.
Be prepared! Purchase flood insurance for your home (and business) and its contents, take an inventory of your belongings and make an emergency plan for you and your family. For more information, click here.
Floods can happen almost anywhere. They are not limited to coastal areas or to devastating tropical storms. Find Out More
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