State Civil Defense officials are testing 13 warning sirens on Oahu today and tomorrow. 

Residents might hear a steady siren tone and should not be alarmed. 

Sirens will be tested today starting at about 9 a.m. to 11 a.m. from Makaha to Hono­uli­uli, and at about 2 p.m. to 4 p.m. from Sandy Beach to Mau­na­lua Bay. Tomorrow, sirens will be tested from Aikahi to Wai­ahole beginning at about 9 a.m. and 11 a.m. , and at Turtle Bay from about 2 p.m. to 4 p.m. Residents may call state Civil Defense at 733-4300 with questions or concerns.