Kolkata, May 1 -- Even as parts of south-western Bengal simmered in the vicinity of 45-46 degrees centigrade, Kolkata on Tuesday recorded its all-time highest temperature at 43 degrees which is six degrees above normal, said the weather office, adding the temperature is to go up in the coming 3-4 days

Kolkata had recorded highest temperature of 41.7 degrees 44 years ago in 1980, said sources at Alipore weather office, adding Orange alert had been issued for the City of Joy which had presently turned into a 'city on the boil'.

Red alert has been sounded in the Gangetic West Bengal including the areas adjacent to Chotanagpur plateau like Purulia, Bankura, West Midnapore and Birbhum, sources said advising caution for the election campaigners...