More than 80,000 people are estimated dead or missing 10 days after the 7.9 magnitude earthquake hit Sichuan province in central China, the government said Thursday, as fears rose that disease, rainy weather and aftershocks could stir more problems.

U.N. Secretary-General Ban Ki-moon arrived Thursday in cyclone-damaged Myanmar, formerly known as Burma, to meet with Senior Gen. Than Shwe in hopes of convincing the stringent military junta to loosen restrictions on international aid.

China raised the confirmed death toll from last week's earthquake in the Sichuan province to more than 40,000 Tuesday, with another 30,000 people still missing, as officials grappled to find shelter for some of the 5 million people displaced.