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City of Warrenville
28W701 Stafford Place
Warrenville, IL 60555
Ph: 630-393-9427
Outdoor Emergency Warning Sirens
The outdoor emergency warning sirens in DuPage County are tested on the first Tuesday of every month between 10 and 11 a.m. DuComm, the 911 dispatcher for the City and a number of other DuPage communities, conducts this test. The purpose of the sirens is to alert those who are outdoors to the threat of danger, either due to weather conditions, other natural or man made emergency situations, or a National Emergency.  In the event of such an emergency, DuComm will activate Warrenville's outdoor emergency warning sirens. The City's Emergency Management Agency (EMA) can also activate the sirens, and the senior police officer on duty can order the sirens activated. 

Knowing what to do when you hear the outdoor emergency warning sirens can save your life.

First, seek shelter, in the basement or the lowest level of a sturdy building. Stay close to the most interior wall and away from windows and glass. If you are outdoors, go to the lowest floor of a nearby sturdy building. If there are no buildings nearby, lie flat in a ditch or depression and cover your head. Watch out for flying debris.

After you have reached shelter, seek information about the emergency. Turn on local TV or radio or NOAA Weather Radio. DO NOT CALL 911 FOR INFORMATION.  Only call 911 if you have an emergency to report.  Stay under cover until the warning expires. There is no "all clear" siren. Be prepared in case another warning is issued.

Keep in mind that these are outdoor emergency warning sirens. You might not hear them if you are indoors, especially if you are asleep or in a noisy area. The sirens should not be your only warning mechanism. Be alert to changing conditions when severe weather threatens. Monitor weather reports via NOAA Weather Radio, the Internet, or broadcast radio and television stations.

Alert Center

EMA Public Service Announcement on Warning Sirens