This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing. Temperatures in Hong Kong are expected to drop on Sunday as a cold front sweeps across the south of the country, ending several days of warm and humid weather. The Hong Kong Observatory said on Thursday minimum temperatures could fall to around 13 degrees Celsius (55.4 Fahrenheit) on Sunday, with daytime highs of about 19 degrees. The cooler weather will...