Chandigarh: Heavy fog clogged road and rail traffic in many places in the northern region on Saturday as the cold wave gave a respite to Haryana with the mercury rising appreciably but refused to loosen its hold on Jammu and Kashmir, Himachal Pradesh and Punjab.

Fog reduced visibility considerably in Adampur (200 metres), Halwara (800 m), Ambala (800 m), Sirsawa (100 m), Sirsa (800 m), Suratgarh (500) and in Delhi (300 m), the meteorological office said.

However, air services were operating on schedule as Runway Visibility Range was 1200 m in Delhi.

Jet Airways and Air Deccan officials said here that they would be operating flights to Chandigarh from the National Capital. Amritsar was colder at 3.3 C, Ludhiana 3.4 (down 3) and Patiala 4.9 while in Chandigarh, the mercury rose appreciably to 8.2 (up 1) and the city was greeted with warm sunshine.

In Haryana, the minimum at Hisar settled at 8.8 (up 4), Ambala 6.1 and Karnal 6.3.

Jammu recorded a normal low at 7.6 C but Srinagar residents continued to brave the piercing cold with the minimum reading minus 2.

Shimla registered a cold night at 2.7, Bhuntar 0.2 C and Sundernagar 1.7 C in Himachal Pradesh.

U.P. toll 81

Four more persons lost their lives in Uttar Pradesh taking the toll this winter to 81 as cold wave continued in the state with mercury plummeting to three degrees below normal.

According to reports reaching here, two persons died of biting cold in Chandauli and one each in Jaunpur and Sultanpur which also remained the coldest place in the state recording minimum temperature of six degrees Celsius. Varanasi, Faizabad and Gorakhpur witnessed appreciably below normal temperatures, met office sources here said. -- PTI