I call bullshit. The only part of the oil that can evaporate are the lighter elements — the “emissions”, not the goopy oily substance itself. Evaporation works as a form of distillation and the only pollutants in rain are those picked back up from atmospheric pollutants — like those “emissions” or when you get acid rain. The context of this video is most likely a roadway that has had some exposure to improper disposal of motor oil (tsk! tsk!). The only way the actual oil is could get onto the land would be for a hurricane or tropical storm to push gulf waters onshore in the form of a storm surge — the probably imminent nightmare of all Gulf Coasters. What we SHOULD be worrying about immediately, are those airborne pollutants that are inhalants. The emissions and burn off of the oil are causing the American Lung Association to be in quite a tizzy. I can tell you from personal experience, that I've already encountered the acrid smell of burning oil in the air a couple of mornings here in Louisiana. It ain't lookin' good folks.