Add Yahoo as a preferred source to see more of our stories on Google. ROCK VALLEY, Iowa (KCAU) — The Sioux City Hazmat Response Team was sent to the scene of an explosion near Rock Valley on Tuesday.

ROCK VALLEY, Iowa (KCAU) — The Sioux City Hazmat Response Team was sent to the scene of an explosion near Rock Valley on Tuesday. According to a release from Sioux County Sheriff’s Office, the Rock ...