Thirty-one construction workers miraculously escaped a collapsed tunnel in Los Angeles Wednesday night after climbing over a 12-foot mountain of debris. Trapped 400 feet underground and six miles from the only exit,

Twenty-seven industrial workers were rescued from a collapsed municipal wastewater management tunnel that was under construction in Los Angeles on Wednesday evening, the city’s fire department said.

A portion of a huge industrial tunnel under construction in Los Angeles collapsed Wednesday and up to 15 workers may have been trapped, the Los Angeles Fire Department said.