Almost 200,000 people have been evacuated from an area threatened by a lake created by this month's earthquake in China's Sichuan province.
Residents of Youxian, on the outskirts of Mianyang city, were ordered to move to higher ground in the hills around the town.
Chinese military engineers and soldiers are working 24-hour shifts to drain the quake lake, which reports say contains enough water to fill over 50,000 Olympic-size swimming pools.
Hundreds of soldiers have been digging dams and channels upstream in an effort to reduce pressure on the Fu river and prevent it from overflowing.
Emergency officials are preparing to run a drill to test their readiness to evacuate over 1m people in dozens of villages in the Mianyang region if the lake bursts its banks.
