Iowa Derecho This August Was Most Costly Thunderstorm Event In Modern U.S. History

A tree fell across vehicles at a home in West Des Moines after a severe thunderstorm moved across Iowa on Aug. 10. It was the costliest storm system in modern U.S. history.

The derecho, which raced through the Midwest and focused its attention on Iowa, led to $7.5 billion in damage. That’s more expensive than some hurricanes.

(Image credit: David Pitt/AP)

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