 are recovering. Emergency officials to test the alert system of the Salem and Hope Creek nuclear power plants tonight. FEMA will set off the 37 sirens within 10 miles of the power plants, which include Delaware City, Middletown, Odessa, and Townsend. Residents hearing the siren are advised to tune to WDEL in the case of an emergency. For today, mostly sunny skies, 85 degrees our high. Tonight, partly cloudy, low down to 61 degrees. 1131 on WDEL.