What Is Hurricane Storm Surge, and Why Can It Be So Catastrophic?

Storm surge can push water levels well above normal sea level during a hurricane.

By Anthony C. Didlake Jr., Penn State
Oct 10, 2024 2:00 PM
storm-surge
(Credit: Sean Rayford/Getty Images)

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Of all the hazards that hurricanes bring, storm surge is the greatest threat to life and property along the coast. It can sweep homes off their foundations, flood riverside communities miles inland, and break up dunes and levees that normally protect coastal areas against storms.

As a hurricane reaches the coast, it pushes a huge volume of ocean water ashore. This is what we call storm surge.

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