 MacArthur, WDEL News. Residents in parts of Delaware can expect to hear a three to five minute siren test tonight. People will be testing the alert system for the Salem and Hope Creek nuclear power plant starting about 7.20 p.m. The siren warns those within 10 miles of the reactors to listen to WDEL for an emergency alert message. For today, beautiful day, plenty of sunshine, 85 degrees. Right now, 74. And it's 10 o'clock on WDEL. This is CBS News on the Hour.