Hong Kong remained gripped by extreme heat on Wednesday with temperatures reaching 35 degrees Celsius (95 Fahrenheit) in parts of the city, prompting labour representatives to urge authorities to introduce a district-level index to better protect outdoor workers. The Very Hot Weather Warning and the Amber Heat Stress at Work Warning have been in effect since Wednesday morning, with parts of northern Hong Kong including Yuen Long and Ta Kwu Ling already surpassing 35 degrees before noon,...