Certified Floodplain Manager (CFM) Practice Exam 2026 – Complete Preparation Guide

Question: 1 / 400

What causes a tsunami according to FEMA 480?

A severe tropical storm

Melting polar ice caps

An underwater earthquake or volcano

A tsunami is caused by an underwater earthquake or volcano, which produces large and powerful ocean waves that can create massive destruction along coastlines. While options A, B, and D may all result in water damage, they do not cause the coastline-destroying effects of a tsunami. Severe tropical storms, melting polar ice caps, and overflooding of river basins can all cause flooding in coastal areas, but they do not generate the devastating and often sudden wall of water associated with tsunamis. Additionally, FEMA 480 specifically focuses on natural hazards, making the correct answer most likely related to a natural event.

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Overflooding of river basins

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