are you reffering to the plane shaped marks on the tarmac?

My theory:
It looks like the Night before the picture was taken there may have been a huge storm which grounded the planes or maybe the flights just stopped over for a night, and they sat there overnight as it rained. When the rain stopped and dried up in the mornining, the water that had blown under the plane had stayed because the shadow of the plane kept it much cooler.