Landslides, floods, strong rainstorms and tornadoes have led to multiple deaths across China, with people still missing as meteorologists warn the country faces “complex” disaster prevention challenges this year.The annual flood season, which officially began on July 1, will be affected by global warming and El Nino, they said.President Xi Jinping has instructed that “all-out efforts” must be made for emergency rescue and relief, medical treatment should be provided to the injured and residents affected should be properly resettled, state broadcaster CCTV said.“All local governments should tighten accountability for disaster prevention and relief, thoroughly check rivers, lakes, reservoirs and other regions prone to geological disasters, strengthen early warning, prevention and relief work and ensure safety to people’s lives and property,” he said.A landslide at a village in Longnan in the northwestern province of Gansu buried 33, CCTV reported on Tuesday morning. At the time of the report, 17 people had been rescued, with firefighters, police and medical workers at the scene.The local weather station had warned of heavy rain and wind on Monday evening, cautioning that flooding and geological disasters were possible.