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Duke Energy and county officials reschedule siren test for Catawba Nuclear Station; McGuire Nuclear Station siren test unchanged

YORK, S.C. - Due to the potential for severe weather and the desire to minimize any public concern when hearing a siren, the outdoor warning siren test for Catawba Nuclear Station will be rescheduled to Wednesday, Oct. 17 at approximately 11:50 a.m. 

The 89 sirens within 10 miles of the Catawba Nuclear Station will be tested for three minutes to make sure each siren works properly. This full-cycle siren test is performed once each quarter in cooperation with emergency officials in York, Gaston and Mecklenburg counties, who are responsible for sounding the sirens.

The 67 sirens within 10 miles of the McGuire Nuclear Station will still be tested on Wednesday, Oct. 10.

Hearing a siren does not mean to evacuate. In an emergency, sirens are sounded as a signal for residents to tune to a local radio or TV station that would carry an emergency-alerting message. County officials use these stations to provide information to the public. If sirens are heard and residents are unsure if it is a test or an emergency, they should tune to their local radio or TV station.

For more information about the outdoor warning sirens, residents can refer to information available on