(Harlan, Iowa) – A tornado siren malfunction may have rattled a few nerves Sunday night, as severe storms were passing through the Shelby County. According to social media post by Shelby County Emergency Management Coordinator Alex Londo, several residents in Harlan heard a tornado siren [sound] Sunday due to a malfunction. Londo said “The siren located at Dr Joseph Spearing park went off on its own at 11:15pm. After crews responded and deactivated the siren the battery backup system kicked on at that siren and started sounding it again shorty after midnight.”

According to Londo, that was the reason the siren went off twice Sunday night, “for extended periods of time.” Repairs were being made to the siren Monday morning.