BEIJING—Workers were about 1.1 kilometers (0.7 miles) from the entrance to the tunnel when a strange noise was heard and material started falling from the top of the tunnel, Yan Dawu, the deputy general manager of the construction company, said at a news conference. An evacuation was ordered, but water gushed in and 14 people were unable to get out, Yan said. “We feel deeply guilty and deeply blame ourselves,” he said. The area where they were working is under a reservoir. By 12:30 p.m., rescue teams had plugged the hole where water was coming in. They were draining and pumping water from the reservoir as well as from the tunnel. More than 1,000 workers, 22 fire trucks, and five pumping vehicles were taking part in the effort, with search and rescue teams dispatched from surrounding cities in Guangdong province. In March, two workers died in another part of the …