India, Jan. 14 -- Cold wave conditions continued for a fourth day on Wednesday as the mercury plunged 3.6 degrees below normal to 3.8degC at Safdarjung, Delhi's representative weather observatory, and the air quality remained "very poor". A minimum temperature of 3.6degC was recorded at the Lodhi Road observatory, 4degC at Ayanagar, 4.4degC at Palam, and 4.6degC at Ridge.

On Tuesday, Delhi recorded a minimum temperature of 3degC, the coldest in three years since January 2023. The minimum temperature of 2.9degC at Ayanagar on Sunday was the lowest for any weather station this season.

Cold wave conditions were expected to abate from Thursday as a feeble western disturbance approaches. The minimum temperature is expected to be between 4-6d...