Many have noticed the new oily-rainbows in clouds in the past few years. These phenomenon are new as conventional cloud rainbows are much less common and have a different light distribution than petroleum.
The image below occurred September 9th, 2017 while hurricane Irma was approaching Florida. This photo exudes petroleum refraction more dramatically than typical petroleum clouds. This dramatically increased coloration begs the question:
Was heavy petroleum nucleation occurring during the approach of hurricane Irma?
We clearly see petroleum artifacts in the clouds, so it's hard to deny considering it must have gotten there somehow.
These petroleum rainbows are associated with mercury toxicity, which also isn't surprising because an early whistleblower exposed that petroleum is used as a carrier for exotic metals such as mercury in atmospheric spraying (nucleation) operations. The oil enables mercury to "stick and stay" on targets for better distribution among populations. Otherwise, this highly-toxic liquid metal would quickly runoff into drainage systems or the ground.