Missing military flares prompt urgent warning for Lake Michigan beachgoers

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The U.S. Coast Guard is warning beachgoers to “remain clear” if they come across a silver-shaped cylinder along the shoreline, as it could be an armed flare.

Coast Guard Sector Lake Michigan said in a statement three phosphorus pyrotechnic flares were unaccounted for after a joint military exercise with the Coast Guard and Air Force earlier this month offshore Milwaukee.

phosphorous pyrotechnics

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During the exercise, four phosphorus pyrotechnics that were deployed did not activate when entering the water, according to officials.

One phosphorous pyrotechnic was located on Montrose Beach, Illinois, by a lifeguard on May 26. 

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However, three phosphorus pyrotechnics are still unaccounted for.

The missing pyrotechnics are still considered armed when they do not activate.

A satellite image of Lake Michigan

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Phosphorus pyrotechnics produce a red smoke and flame that can reach temperatures of 2,900 degrees Fahrenheit, according to military officials.