Kanpur / Shimla, Jan 07 (ANI): Intense cold wave coupled with dense fog continued to paralyse normal life in northern India on Tuesday, disrupting, flight and train operations. A blanket of thick fog over northern India hit rail traffic with dozens of trains running behind schedule or cancelled. The visibility dropped below 100 metres. People were seen sitting around bonfires on pavements in Kanpur. Meanwhile, the mercury dropped to freezing point in Shimla, leading to formation of frost on plants. The meteorological department of India informed that a strong western disturbance is coming towards north-western part which will result in heavy snowfall in Himachal Pradesh on January 08.