McLean County will be conducting the monthly test of the “Outdoor Warning Sirens” today. Illinois Law requires tests to be conducted at 10:00 am on the first Tuesday of each month.
Should the Outdoor Warning Sirens sound at any time other than the monthly test, tune to this page and local radio stations for the latest information and possible emergency instructions.
For more information on Severe Weather Sirens follow this link.
Frequently Asked Questions
https://www.weather.gov/dvn/sirenFAQ
Original source can be found here.