Duke Energy will test sirens around McGuire Nuclear Station in Huntersville about 11:50 a.m. Wednesday.
The 67 sirens within 10 miles of McGuire will be tested for three minutes to make sure each works properly.
This full-cycle siren test is performed once each quarter in cooperation with emergency officials in Mecklenburg, Gaston, Iredell, Lincoln and Catawba counties.
No public action is required. McGuire is on N.C. 73 at Lake Norman. Joe Marusak