New Delhi [India], December 27 (ANI): As cold wave maintains its grip in northern India, a thick layer of fog engulfed the national capital on Wednesday. Citizens of Delhi woke up to a hazy morning as dense fog covered the city leading to low visibility and disruption in traffic, causing a delay for the commuters. The temperature in the national capital dropped to almost seven degrees. The Indian meteorological department has issued a warning of ‘dense to very dense’ fog in Delhi and Uttar Pradesh during 27th-29th December and over isolated pockets of North Rajasthan and north Madhya Pradesh o…