If you will be in Boulder County on Monday, you might get a little prank from the emergency sirens. Okay, it's not really a prank. Boulder County will be testing their emergency sirens on April 1st at 10 a.m. according to a press release. So when you hear them, there is no reason to be alarmed.

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Only a few towns will be participating in the siren test. Those towns are Louisville, Superior, and Jamestown. The following emergency tests in Boulder County will happen on May 6th, June 3rd, July 1st, and August 5th.

Source: Boulder County