<span style="color: #222222;">The national capital was enveloped in a thick blanket of fog this morning as the minimum temperature settled at 8.4 degrees Celsius. Visibility was reduced to 50 metres in Palam at 5.30 AM. The fog is expected to disperse later in the day and the maximum temperature is likely to hover around 18 degrees Celsius.<br />'' <br />''<br />''Around 20 north-bound trains were delayed by two to five hours due to the fog.</span><br />