Their power can roll boulders, tear out trees, destroy buildings and bridges, scour out new channels and can also trigger catastrophic mudslides. They can begin within the first hours of a rain event, or after a dam or levee failure, or following the sudden release of water held back by an ice or debris jam. Flash Floods occur with little or no warning and are deadly and fast moving.Basements, buildings and entire swaths of land can become inundated, leading to deadly hazards, dangerous structural damage, and lost property or crops. Streets can become swift-moving rivers, creating great danger for pedestrians and drivers. Floods develop over several hours or several days.Hurricane or tropical storms can bring intense rainfall in the summer and fall.įloods and Flash Floods each provide unique risks.Severe thunderstorms can bring heavy rain in the spring and summer. Melting snow can combine with rain in the winter and early spring.Ice or debris jams causing river or streams to overflow.Prolonged rain over several days, and/or.Intense rainfall over a short period of time,.The greatest risks occur in known flood plains when there is: Floods are among the most frequent natural hazards in New Jersey, and among the most devastating in terms of human hardship and economic loss.
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