Indian people exercise amid heavy fog and air pollution in Amritsar on January 2, 2018. Pic/AFP

A thick blanket of fog enveloped several areas of Punjab and Haryana, adversely affecting, air, rail and road traffic even as most areas in the two states shivered under intense cold. The minimum temperatures hovered between three degrees above normal to one notch below normal in most parts of the states, the MeT office said here today. Bathinda at a low of 2.7 degrees Celsius was the coldest in the two states.