Michael Biadasz, 29, was killed, along with 16 cows, on his family's farm.
A 29-year-old Wisconsin man died on his family’s farm after fumes from a cow manure pit mixed with unusual weather conditions to form a “deadly dome of air,” authorities said.
Michael Biadasz died after becoming overwhelmed by gases emanating from the waste repository, the coroner ruled.
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His father, Bob Biadasz, said unexpected weather conditions trapped the fumes "in a perfect storm" hovering close to the ground, WAOW-TV reported.
Sixteen cows also died on the farm near Amherst, Wisconsin.
“The family is devastated, absolutely devastated,” said Portage County Coroner Scott Rifleman, the station reported.
"This was just a tragic series of events that occurred," the coroner said. "It’s just a fluke."
Methane and sulfur dioxide fumes are believed to be the cause of death.
Biadasz had cleaned the pit, which is about the size of a football field, hundreds of times, his father said. But this time, abnormal weather conditions prevented the deadly gases from dissipating.
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The young man was found about 6:30 a.m. by farm workers who had come to help empty the holding unit.
His funeral is scheduled for Thursday.
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