Either these planes were hit by some Alien Death Ray or it gets so hot in Peoria that the planes meltdown after landing. Seven have already melted and a few more are turning to mud, right before our eyes.
I think it's ground (based (based on a Flash Gordon episode) ) The prop wash from the plane with the red fuselage on the right is retro-reflected forward in a counter-clockwise spiral because the rotation of the earth is slowing by a second per year. The reason the plane to its immediate S.E. is spared from the harmful retro-reflective energy of the prop wash is only because the boomerang shape of the jetway between them cancels the harmonicas of the perturbation.
Yet another reason we all need to walk counter clockwise
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.