LOS ANGELES (AP) — After a section of a large industrial tunnel caved in, more than two dozen construction workers who were hundreds of feet below the streets of Los Angeles raced for miles in the dark — clambering over towering debris, terrified of being trapped, according to descriptions by their family members and officials Thursday, a day after the collapse.

Remarkably, all 31 workers escaped to safety Wednesday night and none suffered any major injuries.

Fire Department Chief Ronnie Villanueva said the workers had to make it through the most treacherous part themselves, climbing over more than 12 feet (3.6 meters) of loose dirt before rescuers could reach them and drive them to the only opening.

The tunnel, which is 18 feet (5.5 meters) wide and 7 miles (11.3 kilometers) long, is u

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