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Some residents of Milwaukee County, Wisconsin had a rude awakening Sunday morning (January 30th) when tornado sirens went off—but there was no tornado threat or severe weather. The Milwaukee County Sheriff's Office said the siren sounding was caused in error when it went off around 4:30 a.m. County dispatchers say the faulty siren was reset. The Milwaukee County Office of Emergency Management said officials were looking into what happened. No other details were released.