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Fort Smith/Fayetteville News | 5newsonline KFSM 5NEWS | Get the local news and weather where you live from 5NEWS. Covering Fort Smith, Fayetteville, Bentonville, and all of Northwest Arkansas and the River Valley.

Why do people use sandbags before a flood?

It's common to see homes barricaded with sandbags in anticipation of severe flooding. Why are sandbags used and what makes them so effective?