HONG KONG—One worker died and others were trapped Friday when a major rainstorm blew traditional bamboo scaffolding off the side of a building under construction in Hong Kong, officials and reports said. The city was battered by heavy rain and high winds as other parts of the country also experienced dangerous weather conditions. Local media reported that construction workers and several other people trapped in two cars were rescued by emergency workers after the scaffold collapsed. The Hong Kong Observatory reported that Tropical Storm Lionrock was southwest of the regional financial hub, which has a population of 7.5 million. Maximum sustained winds were measured at 38 miles per hour. It said outer rain bands associated with Lionrock would continue to bring widespread heavy rain to the coast of Guangdong province just across the border from Hong Kong in mainland China. It also issued warnings of stormy seas and possible flooding. …