CHENGDU (AFP) - A strong aftershock jolted southwestern China on Sunday, killing at least two people, destroying 71,300 homes and rattling millions still reeling from the massive earthquake two weeks ago. The aftershock, the strongest to hit Sichuan province since the devastating May 12 quake, came as the death toll from the initial tremor topped 62,500, and as more foreign aid poured into the disaster zone. Relief workers raced to reach those in need as the already tough conditions for millions of survivors living in makeshift camps worsened, with rain falling throughout the day and forecasters predicting heavy downpours overnight. Sunday's aftershock measured 6.4 on the Richter scale, an official with the Sichuan Earthquake Bureau told AFP, making it the strongest since the 8.0 quake that destroyed large swathes of Sichuan two weeks ago. The US Geological Survey put the magnitude of Sunday's aftershock at 5.8. Two people was killed and more than 480 injured, 41 of them seriously, in the aftershock, with the city of Guangyuan, north of the provincial capital Chengdu, particularly hard hit, state-run Xinhua news agency reported. An earthquake relief official in the city of Guangyuan, Wang Fei, was quoted by Xinhua as saying about 71,300 homes had collapsed there, and more than 200,000 others were in danger of collapsing. The quake, which struck mid-afternoon and was centred about 250km northeast of Chengdu, sent people fleeing from buildings, AFP correspondents witnessed. "Houses started to shake and everybody went out into the street," Chengdu resident Lou Taiyi told AFP. The aftershock compounded fears of further destruction stemming from the May 12 disaster - the worst earthquake in China in more than 30 years. The government said the quake had left 69 dams in danger of bursting and created "dangerous situations" at hundreds of others. E Jingping, Vice-Minister of water resources, however told reporters in Beijing that authorities had taken a number of steps to alleviate the danger, including draining or lowering the water levels at hundreds of reservoirs. "Of the dams in Sichuan province where risks have appeared, 69 were in danger of collapsing," Jingping. He said another 310 faced "highly dangerous situations," while a further 1,424 faced moderate risks. Authorities have taken a number of steps to address the problems, including completely draining 69 reservoirs and lowering the water levels at 826 others, he added. The death toll continued to rise, with the government putting the figure Sunday at 62,664, with another 23,775 listed as missing. Aid continued to pour into the region for the more than 5.4 million homeless survivors and more than 11 million people who China says are expected to be evacuated from quake-hit areas to temporary camps. A Russian military transport plane carrying tents, blankets, field hospitals and other supplies landed in Chengdu, state media reports said - one of 12 Russian aid flights expected. A French medical team also arrived in Chengdu and headed for Guangyuan to help treat quake victims there, members told AFP. On the home front, President Hu Jintao urged workers at a factory making pre-fabricated housing in central Hubei province to "go all out and complete the order early, so as to support the earthquake relief work," Xinhua said. Grief turned to anger for about two dozen parents of children killed in the quake, who staged a rare protest Sunday demanding a probe into whether shoddy school construction was to blame for the deaths of their children. State media has said 9,000 teachers or schoolchildren were among the dead and missing. The government has vowed to investigate and punish anyone found responsible for substandard construction at schools. An elderly man, Xiao Zhihu, 80, was rescued unhurt from the collapsed remains of his home 11 days after the massive quake in southwestern China, state media reported on Sunday.