The national capital recorded a minimum temperature of 7.6 degrees Celsius this morning, the season's lowest. The maximum temperature is likely to settle at 24 degrees Celsius.<br />''<br />''Falling temperatures, high humidity and calm winds have led to an increase in pollution levels in the national capital and its suburbs.<br />''<span style="color: #222222;"><br />''The overall air quality index in the city crossed the 300 mark for the first time in 11 days, even as pollution levels at a few places shot up to 'severe' levels.</span><br />