Rain and hailstorms since Saturday have brought landslides and flight delays to south China's Guangdong Province and Guangxi Zhuang Autonomous Region. In Ziyuan County, Guangxi, rescuers on Monday are still searching for a mine worker who was buried by a landslide on Sunday. Two giant rocks from the rain-soaked mine hill fell on roads on Sunday. Mine workers were clearing the rocks when the landslide occurred, which left one of them missing and another injured. Heavy rain has also grounded flights and stranded passengers at major airports of Guangdong since Sunday. On Monday morning, the China Central Meteorological Station maintained a blue rainstorm alert for the region, down from a red one given on Sunday. China has a four-tier rainstorm alert system, with red being the most serious, followed by orange, yellow and blue. Schools in Shenzhen City, Guangdong, suspended classes on Monday, as the local weather department warned the rain will be accompanied by strong thunder and lightning.