The Hong Kong Observatory is advising people to wrap up warm over the next few days as a powerful cold front edges closer to Hong Kong. The observatory's assistant director is Cheng Cho-ming said the mercury is expected to dip to around 12 degrees by Monday, although temperatures will start to climb again by mid-week. “We expect that the temperature will gradually drop to around 12, 13 degrees in the morning of Monday. It will increase a little bit, but it will drop again on Wednesday morning. Thereafter, we expect the temperature will continue to rise,” he said. The chief executive officer of the Senior Citizen Home Safety Association, Maura Wong, said while elderly people should try to stay warm, it's important that they don't overdress. “Don’t bundle up too much or wear overly tight clothes because it could affect blood circulation and make it easier for you to fall,” she said. “Ventilation is really important. Sometimes the elderly close all the windows and turn on electric heaters. This could be dangerous,” Wong said.