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TAOHUA MOUNTAIN, China (AP) ― For some evacuees, it was their fifth move since the earthquake. After relocating yet again, the weary survivors had little to do Friday but wait for an earthquake-formed lake to drain so they could begin rebuilding their lives.

The threat of flooding from Tangjiashan lake has forced authorities to evacuate more than 250,000 people. Workers deepened a quickly built diversion channel Friday and water began draining into the new spillway early Saturday, but the threat of flooding remained, the official Xinhua News Agency reported.

"I can't even cry, even if I want to. First it was the earthquake, now it's floods," said Yu Taichun, a doctor who was keeping watch over a small medical center in a tent city of about 2,500 people on the forested slopes of the Taohua, or "Peach Blossom," Mountain.

Yu said he has moved five times since the quake, arriving about two weeks ago at the latest camp overlooking the town of Qinglian, about 20 miles downstream from Tanjiashan lake.

Nerves were frayed among the refugees, who had little to do except wait for updates on the lake-the largest of more than 30 that have formed behind landslides caused by the magnitude-7.9 temblor on May 12. Arguments over petty matters were common.

Heatstroke was becoming a problem in the camp, where temperatures in the tents would often top 100 degrees, Yu said. Trucks delivered water several times a day, but there were no shower facilities and toilets were backed up.

On Friday, under heavy rains, the area was deluged with rain. Residents cooked their dinners over open fires while holding umbrellas. Others, loaded down with black discs of coal for fuel, struggled to walk on the muddy ground. Many scrambled to close off their makeshift homes to the downpour.

The evacuees were resigned. "What can you do?" was a common lament.

In the nearby city of Mianyang, some questioned whether the government had overreacted to the lake's threat after residents were evacuated from more permanent camps more than a week ago without any clear idea of when the lake would drain-or burst.

"All I do every day is eat noodles, listen to the radio and sleep," said retiree Zhen Yiyuan, camped in a hillside park.

Zhen, 61, said his sister living in the destroyed mountain village of Yuli had it far worse, surviving only on salvaged corn and other crops after the few pounds of rice airdropped after the quake ran out.

Authorities have nervously watched Tangjiashan for more than two weeks, worrying that the wall of earth and rocks that dammed the river could collapse, flooding the already miserable disaster zone below.

Even with water flowing into the specially built diversion channel, engineers were uncertain about controlling the discharge of water, state media said.

Along with communities downstream, flooding threatens a railway bridge and a state-owned China National Petroleum Corp. oil pipeline, and emergency crews rushed to reinforce them over the past two days.

Amid scattered complaints of misuse of quake aid, the government's National Audit Office announced it would "investigate and deal with any attempt to hide, intercept or misappropriate" donated funds and materials, Xinhua said.

Domestic and foreign donations had reached $6.3 billion as of Thursday, Xinhua said. It said the audit office's report would be issued around June 20.

The quake centered in Sichuan province killed 69,127 people, with 17,918 still missing, according to the latest government figures.

The provincial government has estimated about 7,000 of the victims were children with no siblings. The National Population and Family Planning Commission will send a medical team to the quake zone to perform reverse sterilization operations on couples that want to have another child, Xinhua reported.

"The team, comprised of experts on childbearing, will conduct surgery in the quake-hit areas to provide technological support for those wanting to give birth to another," the director of the commission's science and technology bureau, Zhang Shikun, was quoted as saying.

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