<span style="color: #222222;">Cold wave continued unabated in the national capital today. Twenty-one trains were delayed for a maximum of six hours in North India due to weather conditions. The minimum temperature was recorded at 4.2 degrees Celsius, three notches below normal last night. <br />''<br />''Met department said, the city will witness clear sky and severe cold day conditions. The maximum temperature will hover around 15 degrees Celsius. With a numbing cold continuing to sweep Delhi-NCR, the region is expected to record its second-coldest December since 1901.</span><br />