How did the dense fog help the British and French allied forces to create a "nine-day miracle"?

1940 At noon on May 24, Hitler ordered the troops to stop moving forward, and it was not until the afternoon of May 26 that the order to continue moving forward was cancelled. Using these two days, the Coalition forces set up a circular line of defense on the beach to cover the retreat. From the evening of May 26th to June 4th, the evacuation operation lasted for nine days. During these nine days, the Germans not only attacked from the ground, but also bombed across the Dover Strait. At this time, the weather stood on the side of the Coalition forces. From 26th to 3rd1,heavy fog and thick clouds hung over the strait, and the black smoke from the burning oil depot made it impossible for German fighters to find the bombing target. By the morning of the 4th, the allied forces had withdrawn 346,000 people, who were the main force in the battle when Mindy landed later. Some people say that smoke has created a miracle, because this is not an ordinary retreat, but the future of Britain as a whole!