Denver’s outdoor warning sirens will sound for three minutes on Wednesday morning as officials test the city’s emergency systems.
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All 86 outdoor sirens are scheduled to go off at 11 a.m., and at the same time the wireless emergency alert system will send a test text message to all mobile phones in Denver.
People in neighboring counties may also receive the emergency alert message, the Denver Office of Emergency Management said in a statement.
“Speed and clarity are critical in an emergency,” Executive Director Matthew Mueller said in a statement. “This test helps ensure Denver can deliver alerts across multiple platforms, so people know what to do right away.”
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Denver officials have mistakenly sent emergency alerts about isolated police activity to the entire city twice in recent months — once in January when a person was barricaded near the University of Denver and once in April when two armed robbery suspects ran into a nearby home in Ruby Hill.
Denver emergency response officials may start using the outdoor sirens more often, including for destructive thunderstorms or flash flooding, instead of just for tornado warnings, city leaders said in a news release.
While Denverites don’t need to take any action during the test on Wednesday, the sirens are usually a sign to seek shelter indoors immediately and check for updates from the city and local news outlets, according to Denver officials.
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